Biden's comeback leaves Sanders little time to expand appeal

WASHINGTON, March 5 (Reuters) - After losing the momentum in the Democratic presidential race, Bernie Sanders has work to do - and little time to do it - to build the "multiracial, multigenerational movement" he says will propel him to victory over President Donald Trump in November.

In an unexpectedly strong night for Joe Biden, the former vice president won 10 of the 14 states up for grabs on Super Tuesday, confirming suspicions that Sanders was struggling to expand his base, particularly among older voters and African Americans.

Sanders' supporters said on Wednesday the disappointing results were no cause for panic but showed that the self-avowed democratic socialist senator from Vermont still needed to prove he could broaden his base enough to capture the Democratic nomination.

Sanders was strongest on Tuesday among young and Latino voters, according to exit poll data, and scored a major victory winning California, the state with the most delegates.

But a far wider coalition fueled Biden's victories, with some of his biggest support coming from African Americans - a key Democratic voting bloc - and white voters over 60 - a group that regularly turns out in large numbers.

In Texas, where Biden narrowly beat Sanders, Biden won among black voters by 60% to 17%, according to exit polls.

"I won't absolve the Bernie campaign of not doing the deeper work around the black community," said Natalia Salgado, national political director at the Center for Popular Democracy Action, which endorsed Sanders in December. "I think if the Bernie camp wasn't paying attention before last night, they're paying attention now."

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Bernie Sanders' 2020 presidential bid
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Bernie Sanders' 2020 presidential bid
Democratic presidential hopeful Vermont Senator Bernie Sanders speaks during a Get Out to Caucus Rally at Springs Preserve Amphitheater in Las Vegas, Nevada, on February 21, 2020. (Photo by Frederic J. BROWN / AFP) (Photo by FREDERIC J. BROWN/AFP via Getty Images)
AUSTIN, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) and his wife Jane Sanders wave to the crowd at the end of a campaign rally at Vic Mathias Shores Park on February 23, 2020 in Austin, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
AUSTIN, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a campaign rally at Vic Mathias Shores Park on February 23, 2020 in Austin, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
AUSTIN, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a campaign rally at Vic Mathias Shores Park on February 23, 2020 in Austin, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
AUSTIN, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) and his wife Jane Sanders arrive onstage for a campaign rally at Vic Mathias Shores Park on February 23, 2020 in Austin, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
Supporters of Democratic presidential hopeful Vermont Senator Bernie Sanders cheer during a rally at Houston University in Houston, Texas on February 23, 2020. (Photo by Mark Felix / AFP) (Photo by MARK FELIX/AFP via Getty Images)
AUSTIN, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a campaign rally at Vic Mathias Shores Park on February 23, 2020 in Austin, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
AUSTIN, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a campaign rally at Vic Mathias Shores Park on February 23, 2020 in Austin, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
AUSTIN, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a campaign rally at Vic Mathias Shores Park on February 23, 2020 in Austin, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
AUSTIN, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) waves as he arrives onstage for a campaign rally at Vic Mathias Shores Park on February 23, 2020 in Austin, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders speaks during a rally at Houston University in Houston, Texas on February 23, 2020. (Photo by Mark Felix / AFP) (Photo by MARK FELIX/AFP via Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders and his wife Jane O'Meara Sanders arrive on stage during a rally at Houston University in Houston, Texas on February 23, 2020. (Photo by Mark Felix / AFP) (Photo by MARK FELIX/AFP via Getty Images)
TOPSHOT - Democratic presidential hopeful Vermont Senator Bernie Sanders speaks during a rally at Houston University in Houston, Texas on February 23, 2020. (Photo by Mark Felix / AFP) (Photo by MARK FELIX/AFP via Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders speaks during a rally at Houston University in Houston, Texas on February 23, 2020. (Photo by Mark Felix / AFP) (Photo by MARK FELIX/AFP via Getty Images)
Supporters of Democratic presidential hopeful Vermont Senator Bernie Sanders cheer during a rally at Houston University in Houston, Texas on February 23, 2020. (Photo by Mark Felix / AFP) (Photo by MARK FELIX/AFP via Getty Images)
HOUSTON, TX - FEBRUARY 23: (L-R) Democratic presidential candidate Sen. Bernie Sanders (I-VT) and his wife Jane Sanders wave at the end of a campaign rally at the University of Houston on February 23, 2020 in Houston, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
HOUSTON, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a campaign rally at the University of Houston on February 23, 2020 in Houston, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
HOUSTON, TX - FEBRUARY 23: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a campaign rally at the University of Houston on February 23, 2020 in Houston, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
Supporters of Democratic presidential hopeful Vermont Senator Bernie Sanders cheer during a rally at Houston University in Houston, Texas on February 23, 2020. (Photo by Mark Felix / AFP) (Photo by MARK FELIX/AFP via Getty Images)
Supporters of Democratic presidential hopeful Vermont Senator Bernie Sanders cheer during a rally at Houston University in Houston, Texas on February 23, 2020. (Photo by Mark Felix / AFP) (Photo by MARK FELIX/AFP via Getty Images)
SAN ANTONIO, TX - FEBRUARY 22: Democratic presidential candidate Sen. Bernie Sanders (I-VT) and his wife Jane Sanders wave as they exit the stage after winning the Nevada caucuses during a campaign rally at Cowboys Dancehall on February 22, 2020 in San Antonio, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states. (Photo by Drew Angerer/Getty Images)
SAN ANTONIO, TX - FEBRUARY 22: Democratic presidential candidate Sen. Bernie Sanders (I-VT) and his wife Jane Sanders wave as they exit the stage after winning the Nevada caucuses during a campaign rally at Cowboys Dancehall on February 22, 2020 in San Antonio, Texas. With early voting underway in Texas, Sanders is holding four rallies in the delegate-rich state this weekend before traveling on to South Carolina. Texas holds their primary on Super Tuesday March 3rd, along with over a dozen other states (Photo by Drew Angerer/Getty Images)
Supporters of Democratic presidential hopeful Vermont Senator Bernie Sanders cheer during a rally at the Abraham Chavez Theater on February 22, 2020 in El Paso, Texas. - Leftist Bernie Sanders took an early lead on February 22 in Nevada's caucuses, the third nominating contest for Democrats in their high-stakes process to see who will challenge Republican Donald Trump in November's presidential election. (Photo by Paul Ratje / AFP) (Photo by PAUL RATJE/AFP via Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders gestures as he speaks during a rally at the Abraham Chavez Theater on February 22, 2020 in El Paso, Texas. - Leftist Bernie Sanders took an early lead on February 22 in Nevada's caucuses, the third nominating contest for Democrats in their high-stakes process to see who will challenge Republican Donald Trump in November's presidential election. (Photo by Paul Ratje / AFP) (Photo by PAUL RATJE/AFP via Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders gestures as he speaks during a rally at the Abraham Chavez Theater on February 22, 2020 in El Paso, Texas. - Leftist Bernie Sanders took an early lead on February 22 in Nevada's caucuses, the third nominating contest for Democrats in their high-stakes process to see who will challenge Republican Donald Trump in November's presidential election. (Photo by Paul Ratje / AFP) (Photo by PAUL RATJE/AFP via Getty Images)
Olivia Thomas holds a sign inside the Abraham Chavez Theater ahead of a rally for Democratic presidential hopeful Vermont Senator Bernie Sanders on February 22, 2020 in El Paso, Texas. - Leftist Bernie Sanders took an early lead on February 22 in Nevada's caucuses, the third nominating contest for Democrats in their high-stakes process to see who will challenge Republican Donald Trump in November's presidential election. (Photo by Paul Ratje / AFP) (Photo by PAUL RATJE/AFP via Getty Images)
EL PASO, TX - FEBRUARY 22: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a campaign rally on February 22, 2020 in El Paso, Texas. With less than two weeks before Super Tuesday, Sen. Sanders is spending the weekend campaigning in Texas. (Photo by Cengiz Yar/Getty Images)
EL PASO, TX - FEBRUARY 22: People scream ahead of democratic presidential candidate Sen. Bernie Sanders (I-VT) taking the stage at a campaign rally on February 22, 2020 in El Paso, Texas. With less than two weeks before Super Tuesday, Sen. Sanders is spending the weekend campaigning in Texas. (Photo by Cengiz Yar/Getty Images)
EL PASO, TX - FEBRUARY 22: A woman holds a sign for Democratic presidential candidate Sen. Bernie Sanders (I-VT) at a campaign rally on February 22, 2020 in El Paso, Texas. With less than two weeks before Super Tuesday, Sen. Sanders is spending the weekend campaigning in Texas. (Photo by Cengiz Yar/Getty Images)
SANTA ANA, UNITED STATES - FEBRUARY 21, 2020: Supporters of Democratic presidential candidate Sen. Bernie Sanders during a campaign rally in Santa Ana, California. Sanders is campaigning ahead of Super Tuesday and the California Democratic primary.- PHOTOGRAPH BY Ronen Tivony / Echoes Wire/ Barcroft Studios / Future Publishing (Photo credit should read Ronen Tivony / Echoes Wire/Barcroft Media via Getty Images)
SANTA ANA, UNITED STATES - FEBRUARY 21, 2020: Democratic presidential candidate Sen. Bernie Sanders speaks during a campaign rally in Santa Ana, California. Sanders is campaigning ahead of Super Tuesday and the California Democratic primary.- PHOTOGRAPH BY Ronen Tivony / Echoes Wire/ Barcroft Studios / Future Publishing (Photo credit should read Ronen Tivony / Echoes Wire/Barcroft Media via Getty Images)
Supporters hold Bernie placards as Democratic presidential hopeful Vermont Senator Bernie Sanders speaks during a Get Out to Caucus Rally at Springs Preserve Amphitheater in Las Vegas, Nevada, on February 21, 2020. (Photo by Frederic J. Brown / AFP) (Photo by FREDERIC J. BROWN/AFP via Getty Images)
LAS VEGAS, NEVADA - FEBRUARY 21: Democratic presidential candidate Sen. Bernie Sanders (I-VT) waves to supporters at a campaign rally for Sanders on February 21, 2020 in Las Vegas, Nevada. The upcoming Nevada Democratic presidential caucus will be held February 22. (Photo by Mario Tama/Getty Images)
LAS VEGAS, NEVADA - FEBRUARY 21: Supporters of Democratic presidential candidate Sen. Bernie Sanders (I-VT) hold a 'Bernie' sign at a campaign rally for Sanders on February 21, 2020 in Las Vegas, Nevada. The upcoming Nevada Democratic presidential caucus will be held February 22. (Photo by Mario Tama/Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders speaks during a Get Out to Caucus Rally at Springs Preserve Amphitheater in Las Vegas, Nevada, on February 21, 2020. (Photo by FREDERIC J. BROWN / AFP) (Photo by FREDERIC J. BROWN/AFP via Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders greets supporters during a rally at Valley High School in Santa Ana, California, February 21, 2020. (Photo by RINGO CHIU / AFP) (Photo by RINGO CHIU/AFP via Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders addresses a rally at Valley High School in Santa Ana, California, February 21, 2020. (Photo by RINGO CHIU / AFP) (Photo by RINGO CHIU/AFP via Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders gestures as he speaks during a rally at Valley High School in Santa Ana, California, February 21, 2020. (Photo by RINGO CHIU / AFP) (Photo by RINGO CHIU/AFP via Getty Images)
Democratic presidential candidate Bernie Sanders speaks at a press conference prior to a rally at Valley High School in Santa Ana, California, February 21, 2020 (Photo by RINGO CHIU / AFP) (Photo by RINGO CHIU/AFP via Getty Images)
Supporters gather during a rally for US Democratic presidential candidate Bernie Sanders in Valley High School, Santa Ana, California, February 21, 2020. (Photo by RINGO CHIU / AFP) (Photo by RINGO CHIU/AFP via Getty Images)
Supporters gather during a rally for US Democratic presidential candidate Bernie Sanders in Valley High School, Santa Ana, California, February 21, 2020. (Photo by RINGO CHIU / AFP) (Photo by RINGO CHIU/AFP via Getty Images)
Democratic presidential candidate Bernie Sanders speaks at a press conference prior to a rally at Valley High School in Santa Ana, California, February 21, 2020 (Photo by RINGO CHIU / AFP) (Photo by RINGO CHIU/AFP via Getty Images)
Democratic presidential hopefuls Vermont Senator Bernie Sanders (L) and Former Vice President Joe Biden (R) participate in the ninth Democratic primary debate of the 2020 presidential campaign season co-hosted by NBC News, MSNBC, Noticias Telemundo and The Nevada Independent at the Paris Theater in Las Vegas, Nevada, on February 19, 2020. (Photo by Mark RALSTON / AFP) (Photo by MARK RALSTON/AFP via Getty Images)
Democratic presidential hopefuls Massachusetts Senator Elizabeth Warren and Vermont Senator Bernie Sanders speak during a break in the ninth Democratic primary debate of the 2020 presidential campaign season co-hosted by NBC News, MSNBC, Noticias Telemundo and The Nevada Independent at the Paris Theater in Las Vegas, Nevada, on February 19, 2020. (Photo by Mark RALSTON / AFP) (Photo by MARK RALSTON/AFP via Getty Images)
LAS VEGAS, NEVADA - FEBRUARY 19: Democratic presidential candidate Sen. Bernie Sanders (I-VT) smiles during the Democratic presidential primary debate at Paris Las Vegas on February 19, 2020 in Las Vegas, Nevada. Six candidates qualified for the third Democratic presidential primary debate of 2020, which comes just days before the Nevada caucuses on February 22. (Photo by Mario Tama/Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders gestures during the ninth Democratic primary debate of the 2020 presidential campaign season co-hosted by NBC News, MSNBC, Noticias Telemundo and The Nevada Independent at the Paris Theater in Las Vegas, Nevada, on February 19, 2020. (Photo by Mark RALSTON / AFP) (Photo by MARK RALSTON/AFP via Getty Images)
UNITED STATES - FEBRUARY 18: Democratic presidential candidate Bernie Sanders, I-Vt., speaks at a rally at University of Nevada, Las Vegas on Tuesday, Feb. 18, 2020. (Photo by Caroline Brehman/CQ-Roll Call, Inc via Getty Images)
LAS VEGAS, NEVADA - FEBRUARY 18: Democratic presidential candidate Sen. Bernie Sanders (I-VT) and his wife Jane Sanders participate in a march after a campaign rally at University of Nevada February 18, 2020 in Las Vegas, Nevada. Sen. Sanders continues to campaign ahead of the upcoming Nevada Democratic presidential caucus on February 22. (Photo by Alex Wong/Getty Images)
RICHMOND, CALIFORNIA - FEBRUARY 17: Democratic presidential candidate Sen. Bernie Sanders (I-VT) greets attendees during a campaign event on February 17, 2020 in Richmond, California. Bernie Sanders is campaigning in California ahead of the state's Democratic presidential primary on March 3rd. (Photo by Justin Sullivan/Getty Images)
Supporters of Democratic presidential candidate Vermont Senator Bernie Sanders cheer during his campaign rally in Denver, Colorado on February 16, 2020. (Photo by Jason Connolly / AFP) (Photo by JASON CONNOLLY/AFP via Getty Images)
LAS VEGAS, NEVADA - FEBRUARY 15: Joined by members of Make the Road Action and his supporters, Democratic presidential candidate Sen. Bernie Sanders (I-VT), participates in a “March to the Polls” February 15, 2020 in Las Vegas, Nevada. Sen. Sanders continues to campaign for the upcoming Nevada Democratic presidential caucus. (Photo by Alex Wong/Getty Images)
LAS VEGAS, NEVADA - FEBRUARY 15: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks during a “Get Out the Early Vote Rally” at Desert Pines High School February 15, 2020 in Las Vegas, Nevada. Sen. Sanders continues to campaign for the upcoming Nevada Democratic presidential caucus. (Photo by Alex Wong/Getty Images)
DENVER, CO - FEBRUARY 16: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks to a large crowd of supporters at a rally in the Colorado Convention Center on February 16, 2020 in Denver, Colorado. (Photo by Marc Piscotty/Getty Images)
DENVER, CO - FEBRUARY 16: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks to a large crowd of supporters at a rally in the Colorado Convention Center on February 16, 2020 in Denver, Colorado. (Photo by Marc Piscotty/Getty Images)
DENVER, CO - FEBRUARY 16: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks to a large crowd of supporters at a rally in the Colorado Convention Center on February 16, 2020 in Denver, Colorado. (Photo by Marc Piscotty/Getty Images)
DENVER, CO - FEBRUARY 16: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks to a large crowd of supporters at a rally in the Colorado Convention Center on February 16, 2020 in Denver, Colorado. (Photo by Marc Piscotty/Getty Images)
MANCHESTER, NH - FEBRUARY 11: Senator Bernie Sanders stops to take a selfie with a supporter at his Primary Night Rally in Manchester, NH on Feb. 11, 2020. Bernie Sanders claimed victory in the first-of-the-nation primary in New Hampshire. (Photo by Jessica Rinaldi/The Boston Globe via Getty Images)
MANCHESTER, NEW HAMPSHIRE - FEBRUARY 11: Supporters cheer as results start to show on the screen ahead of Sen. Bernie Sanders, I-Vt., 2020 Democratic Presidential Candidate, Primary Night Celebration at SNHU Field House on Tuesday, February 11, 2020 in Manchester, New Hampshire. (Photo by Salwan Georges/The Washington Post via Getty Images)
MANCHESTER, NEW HAMPSHIRE - FEBRUARY 11: Jan Schaffer, of Warrner, NH, watches as results started to show on the screen ahead of Sen. Bernie Sanders, I-Vt., 2020 Democratic Presidential Candidate, Primary Night Celebration at SNHU Field House on Tuesday, February 11, 2020 in Manchester, New Hampshire. (Photo by Salwan Georges/The Washington Post via Getty Images)
MANCHESTER, NEW HAMPSHIRE - FEBRUARY 11: Supporters cheer as results start to show on the screen ahead of Sen. Bernie Sanders, I-Vt., 2020 Democratic Presidential Candidate, Primary Night Celebration at SNHU Field House on Tuesday, February 11, 2020 in Manchester, New Hampshire. (Photo by Salwan Georges/The Washington Post via Getty Images)
MANCHESTER, NEW HAMPSHIRE - FEBRUARY 11: Supporters cheer as results start to show on the screen ahead of Sen. Bernie Sanders, I-Vt., 2020 Democratic Presidential Candidate, Primary Night Celebration at SNHU Field House on Tuesday, February 11, 2020 in Manchester, New Hampshire. (Photo by Salwan Georges/The Washington Post via Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders stands with wife Jane O'Meara Sanders at a Primary Night event at the SNHU Field House in Manchester, New Hampshire on February 11, 2020. - Bernie Sanders won New Hampshire's crucial Democratic primary, beating moderate rivals Pete Buttigieg and Amy Klobuchar in the race to challenge President Donald Trump for the White House, US networks projected. (Photo by TIMOTHY A. CLARY / AFP) (Photo by TIMOTHY A. CLARY/AFP via Getty Images)
Democratic presidential hopeful Vermont Senator Bernie Sanders speaks at a Primary Night event at the SNHU Field House in Manchester, New Hampshire on February 11, 2020. - Bernie Sanders won New Hampshire's crucial Democratic primary, beating moderate rivals Pete Buttigieg and Amy Klobuchar in the race to challenge President Donald Trump for the White House, US networks projected. (Photo by TIMOTHY A. CLARY / AFP) (Photo by TIMOTHY A. CLARY/AFP via Getty Images)
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Larry Cohen, chairman of Our Revolution, a progressive group founded by Sanders but which operates independently from the campaign, said time was short to stage a turnaround. A majority of delegates needed to win the Democratic nomination will have been awarded after primaries next Tuesday and March 17.

Biden led Sanders in the delegate count by 433-388 on Wednesday night, with final results from California still outstanding.

"With this time frame, the key is to stay positive about the kind of nation that we can have and to really continue to screw down on turnout," Cohen said. "The turnout of younger voters wasn't as good as it could have been."

Kyle Kondik, an elections analyst at the University of Virginia, said with Biden looking strong in upcoming contests in Florida and Georgia, Sanders would need to exceed expectations in the Midwest to "regenerate" his campaign.

“Ten days ago, Biden needed to change the race, and now Sanders needs to do the same," Kondik said.

Sanders said he had not had time to analyze all the results but pointed to his success among people of color in California, including Latinos and Asian Americans, as well as African Americans. Exit polling showed Sanders won among all non-white voters in the state.

"We're going to do better with the African-American community and we continue to try to do that," Sanders told reporters on Wednesday in Vermont, without offering specifics.

A lingering question was whether Senator Elizabeth Warren would end her White House bid after more disappointing finishes on Tuesday and throw her support behind her fellow liberal. Sanders said he had spoken to her by phone as she reassessed her campaign.

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Super Tuesday 2020
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Super Tuesday 2020
LOS ANGELES, CALIFORNIA - MARCH 3, 2020: Democratic Presidential candidate former Vice President Joe Biden, accompanied by his wife Dr. Jill Biden, speaks to California voters during a Super Tuesday election night party at Baldwin Hills Recreation Center in Los Angeles, California on Tuesday March 3, 2020. (Photo by Melina Mara/The Washington Post via Getty Images)
Democratic presidential candidate former Vice President Joe Biden speaks at a primary election night campaign rally Tuesday, March 3, 2020, in Los Angeles. (AP Photo/Chris Carlson)
Supporters of Democratic presidential candidate Sen. Bernie Sanders, I-Vt., during a primary night election rally in Essex Junction, Vt., Tuesday, March 3, 2020. (AP Photo/Charles Krupa)
DETROIT, UNITED STATES - MARCH 3, 2020: Elizabeth Warren speaks during a rally held on super Tuesday in Detroit. Super Tuesday will be a major deciding factor in her place in the polls for the Democratic primary election.- PHOTOGRAPH BY Megan Jelinger / Echoes Wire/ Barcroft Studios / Future Publishing (Photo credit should read Megan Jelinger / Echoes Wire/Barcroft Media via Getty Images)
PALM BEACH, FL - MARCH 3: Supporters cheer for Presidential candidate Mike Bloomberg during his Super Tuesday event at the Palm Beach Convention Center in Palm Beach, Florida on Tuesday, March 3, 2020. (Photo by Toni L. Sandys/The Washington Post via Getty Images)
DETROIT, UNITED STATES - MARCH 3, 2020: Elizabeth Warren greets her supporters during a rally held on super Tuesday in Detroit. Super Tuesday will be a major deciding factor in her place in the polls for the Democratic primary election.- PHOTOGRAPH BY Megan Jelinger / Echoes Wire/ Barcroft Studios / Future Publishing (Photo credit should read Megan Jelinger / Echoes Wire/Barcroft Media via Getty Images)
ORLANDO, UNITED STATES - MARCH 3, 2020: Democratic presidential candidate former New York mayor Mike Bloomberg addresses his supporters at a campaign stop at the Bloomberg campaign field office in Orlando.- PHOTOGRAPH BY Paul Hennessy / Echoes Wire/ Barcroft Studios / Future Publishing (Photo credit should read Paul Hennessy / Echoes Wire/Barcroft Media via Getty Images)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., arrives to vote in the Vermont Primary near his home in Burlington, Vt., Tuesday, March 3, 2020. (AP Photo/Charles Krupa)
Nuala sports an "I Voted" sticker while accompanying her owner Jannet Bond to the polls after voting in the Vermont Primary in Burlington, Vt., Tuesday, March 3, 2020. (AP Photo/Charles Krupa)
HERNDON, VA - MARCH 03: Two women mark down their votes on a ballots for the Democratic presidential primary election at a polling place in Armstrong Elementary School on Super Tuesday, March 3, 2020 in Herndon, Virginia. 1,357 Democratic delegates are at stake as voters cast their ballots in 14 states and American Somoa on what is known as Super Tuesday. (Photo by Samuel Corum/Getty Images)
RICHMOND, VA - MARCH 03: Buttons supporting Democratic presidential candidate Sen. Bernie Sanders (I-VT) are seen on the Virginia Commonwealth University Campus on March 3, 2020 in Richmond, Virginia. 1,357 Democratic delegates are at stake as voters cast their ballots in 14 states and American Samoa on what is known as Super Tuesday. (Photo by Zach Gibson/Getty Images)
RICHMOND, VA - MARCH 03: "I Voted" stickers are seen at a polling place on March 3, 2020 in Richmond, Virginia. 1,357 Democratic delegates are at stake as voters cast their ballots in 14 states and American Samoa on what is known as Super Tuesday. (Photo by Zach Gibson/Getty Images)
RICHMOND, VA - MARCH 03: A mural depicting Democratic presidential candidate Sen. Bernie Sanders (I-VT), painted in 2016, is seen on a building on March 3, 2020 in Richmond, Virginia. 1,357 Democratic delegates are at stake as voters cast their ballots in 14 states and American Samoa on what is known as Super Tuesday. (Photo by Zach Gibson/Getty Images)
RICHMOND, VA - MARCH 03: Voters cast ballots at a polling place on March 3, 2020 in Ashland, Virginia. 1,357 Democratic delegates are at stake as voters cast their ballots in 14 states and American Samoa on what is known as Super Tuesday. (Photo by Zach Gibson/Getty Images)
"I Voted" stickers cover a table at a polling station during the North Carolina primary on Super Tuesday in Charlotte, North Carolina on March 3, 2020. - Forteen states and American Samoa are holding presidential primary elections, with over 1400 delegates at stake. Americans vote Tuesday in primaries that play a major role in who will challenge Donald Trump for the presidency, a day after key endorsements dramatically boosted Joe Biden's hopes against surging leftist Bernie Sanders. The backing of Biden by three of his ex-rivals marked an unprecedented turn in a fractured, often bitter campaign. (Photo by Logan Cyrus / AFP) (Photo by LOGAN CYRUS/AFP via Getty Images)
FAYETTEVILLE, NC - MARCH 03: Fayetteville State University students get off a Black Votes Matter bus at Smith Recreation Center on March 3, 2020 in Fayetteville, North Carolina. 1,357 Democratic delegates are at stake as voters cast their ballots in 14 states and American Samoa on what is known as Super Tuesday. (Photo by Melissa Sue Gerrits/Getty Images)
Poll worker Denetria Cooperidge, right, greets voters at the Mississippi Blvd. Christian Church polling location as voters go to the polls on Tuesday, March 3, 2020, to vote in the Super Tuesday primaries. (Jim Weber/Daily Memphian via AP)
Olivia DiNucci, volunteer for the Bernie Sanders campaign, leaves a pamphlet at a residence on the day of the presidential primary in El Paso, Texas on Super Tuesday, March 3, 2020. - Fourteen states and American Samoa are holding presidential primary elections, with over 1400 delegates at stake. Americans vote Tuesday in primaries that play a major role in who will challenge Donald Trump for the presidency, a day after key endorsements dramatically boosted Joe Biden's hopes against surging leftist Bernie Sanders. The backing of Biden by three of his ex-rivals marked an unprecedented turn in a fractured, often bitter campaign. (Photo by Paul Ratje / Agence France-Presse / AFP) (Photo by PAUL RATJE/Agence France-Presse/AFP via Getty Images)
Residents wait to cast their ballots during the Democratic presidential primary in Montgomery, Alabama on Super Tuesday, March 3, 2020. - Fourteen states and American Samoa are holding presidential primary elections, with over 1400 delegates at stake. Americans vote Tuesday in primaries that play a major role in who will challenge Donald Trump for the presidency, a day after key endorsements dramatically boosted Joe Biden's hopes against surging leftist Bernie Sanders. The backing of Biden by three of his ex-rivals marked an unprecedented turn in a fractured, often bitter campaign. (Photo by Mark RALSTON / AFP) (Photo by MARK RALSTON/AFP via Getty Images)
Two people walk under umbrellas outside a polling station at Dallas County Courthouse during the presidential primary in Selma, Alabama on Super Tuesday, March 3, 2020. - Fourteen states and American Samoa are holding presidential primary elections, with over 1400 delegates at stake. Americans vote Tuesday in primaries that play a major role in who will challenge Donald Trump for the presidency, a day after key endorsements dramatically boosted Joe Biden's hopes against surging leftist Bernie Sanders. The backing of Biden by three of his ex-rivals marked an unprecedented turn in a fractured, often bitter campaign. (Photo by Joshua Lott / AFP) (Photo by JOSHUA LOTT/AFP via Getty Images)
Election clerks check in voters for the primary election, Tuesday, March 3, 2020, in Lewiston, Maine. (AP Photo/Robert F. Bukaty)
Joe Cormier votes in the primary election, Tuesday, March 3, 2020, in Freeport, Maine. (AP Photo/Robert F. Bukaty)
Election clerks Pauline Plourde, left, and Susan Gallant process absentee ballots for the primary election, Tuesday, March 3, 2020, in Lewiston, Maine. (AP Photo/Robert F. Bukaty)
Mike Walsh votes in the primary election, Tuesday, March 3, 2020, in Freeport, Maine. (AP Photo/Robert F. Bukaty)
A roll of "I Voted' stickers sit on a table at Town Hall in Richmond, Mass., during the state's primary election, Tuesday, March 3, 2020. (Stephanie Zollshan/The Berkshire Eagle via AP)
Russell Freedman sits outside of the polling station at Lanesborough Town Hall advocating for Democratic presidential candidate Bernie Sanders during the state's primary election, Tuesday, March 3, 2020, in Lanesborough, Mass. (Stephanie Zollshan/The Berkshire Eagle via AP)
Joe Michael places election signs near an early voting site in San Antonio, Tuesday, Feb. 18, 2020. Early primary voting for began Tuesday for Texas and Arkansas ahead of Super Tuesday. (AP Photo/Eric Gay)
A voter places his ballot in the ballot counter at the downtown library polling site in Minneapolis as part of Minnesota's Super Tuesday presidential nomination primary March 3, 2020. (AP Photo/Jim Mone)
Hazel Goree, 3, waits as her mother, Kristin Goree, right, votes on Super Tuesday in Sacramento, Calif., Tuesday, March 3, 2020. (AP Photo/Rich Pedroncelli)
California Gov. Gavin Newsom , center, casts his ballot as his wife, First Partner Jennifer Siebel Newsom, left, waits to cast hers while voting on Super Tuesday in Sacramento, Calif., Tuesday, March 3, 2020. (AP Photo/Rich Pedroncelli)
Volunteer Anabelle observes other volunteers at the Paradise Senior Center, a polling place for the presidential primary during Super Tuesday on March 3, 2020 in San Diego, California. (Photo by ARIANA DREHSLER / AFP) (Photo by ARIANA DREHSLER/AFP via Getty Images)
People wait to vote during the presidential primary at the Santa Monica Public Library in Santa Monica, California on Super Tuesday, March 3, 2020 - Fourteen states and American Samoa are holding presidential primary elections, with over 1400 delegates at stake. Americans vote Tuesday in primaries that play a major role in who will challenge Donald Trump for the presidency, a day after key endorsements dramatically boosted Joe Biden's hopes against surging leftist Bernie Sanders. The backing of Biden by three of his ex-rivals marked an unprecedented turn in a fractured, often bitter campaign. (Photo by Mark RALSTON / AFP) (Photo by MARK RALSTON/AFP via Getty Images)
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Progressive groups said they hoped Sanders and Warren would find a way to work together. But such a partnership is no slam dunk after a tough race between the liberal allies and will not guarantee a rush of new supporters for Sanders.

"It's not a fait accompli that all of her support goes to Bernie Sanders," said Neil Sroka, communications director for Democracy for America, a political action committee that endorsed Sanders on Monday. "If Senator Warren departs in the race, I also think Bernie Sanders is going to have to earn her endorsement."

(Reporting by Simon Lewis; Additional reporting by Joseph Ax and Trevor Hunnicutt; Editing by Colleen Jenkins and Peter Cooney)

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