Democratic presidential contender Bernie Sanders easily won nominating contests in Alaska, Washington and Hawaii on Saturday, chipping away at front-runner Hillary Clinton's commanding lead in the race to pick the party's candidate for the White House.
Sanders still faces a steep climb to overtake Clinton but the big victories in the West generated more momentum for his upstart campaign and could stave off calls from Democratic leaders that he should wrap up his bid in the name of party unity.
Sanders appeared headed to victory margins of more than 50 percentage points in both Alaska and Washington, and led by about 40 points in Hawaii with some 90 percent of the results tallied there.
See images of Bernie Sanders on the campaign trail:
Bernie Sanders on the campaign trail
US Democrat Bernie Sanders wins Alaska, Washington caucuses
PHOENIX, AZ - MARCH 15: Democratic presidential candidate Sen. Bernie Sanders (D-VT) speaks to a crowd gathered at the Phoenix Convention Center during a campaign rally on March 15, 2016 in Phoenix, Arizona. Hillary Clinton won the Democratic primary elections in Florida, North Carolina and Ohio, while Missouri and Illinois remain tight races. (Photo by Ralph Freso/Getty Images)
DES MOINES, IA - JANUARY 26: Democratic presidential candidate Sen. Bernie Sanders (I-VT) speaks to the media after holding a campaign event with United Steelworkers Local 310L, on January 26, 2016 in Des Moines, Iowa. Sanders continues his quest to become the Democratic presidential nominee.. (Photo by Joe Raedle/Getty Images)
TOPSHOT - US Senator and Democratic Presidential Candidate Bernie Sanders speaks during a campaign event at the University of Northern Iowa in Cedar Falls, Iowa, January 24, 2016, ahead of the Iowa Caucus. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
Senator Bernie Sanders, an independent from Vermont and 2016 Democratic presidential candidate, participates in the Democratic presidential candidate debate in Charleston, South Carolina, U.S., on Sunday, Jan. 17, 2016. Hours before Sunday's Democratic debate, the two top Democratic contenders held a warm-up bout of sorts in multiple separate appearances on political talk shows, at a time when the polling gap between the pair has narrowed in early-voting states. Photographer: Patrick T. Fallon/Bloomberg via Getty Images
NEW YORK, NY - JANUARY 05: Democratic presidential candidate Sen. Bernie Sanders (I-VT) shakes hands with supporters after outlining his plan to reform the U.S. financial sector on January 5, 2016 in New York City. Sanders is demanding greater financial oversight and greater government action for banks and individuals that break financial laws. (Photo by Andrew Burton/Getty Images)
LEBANON, NH - NOVEMBER 11: Presidential candidate Bernie Sanders (I-VT) marches in the Veterans Day Parade November 11, 2015 in Lebanon, New Hampshire. Sanders goes into the Democrats second debate this weekend still running strong in the polls.(Photo by Darren McCollester/Getty Images)
Senator Bernie Sanders, an independent from Vermont and 2016 Democratic presidential candidate, speaks at the Congressional Hispanic Caucus Institute conference in Washington, D.C., U.S., on Wednesday, Oct. 7, 2015. While next Tuesday's first Democratic presidential debate will probably lack the name-calling and sharp jabs of the Republican face-offs, there's still potential for strong disagreements between the party's leading contenders. Photographer: Andrew Harrer/Bloomberg via Getty Images
Democratic Presidential candidate Senator Bernie Sanders speaks about the Workplace Democracy Act on Capitol Hill in Washington, DC on October 6, 2015. AFP PHOTO/JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
US Senator from Vermont and Democratic presidential candidate Bernie Sanders addresses striking low-wage contract workers from the US Capitol and religious leaders at the Lutheran Church of the Reformation in Washington, DC, on September 22, 2015 for an interfaith service ahead of the arrival of Pope Francis for a six-day visit to the US. AFP PHOTO/NICHOLAS KAMM (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
MANCHESTER, NH - SEPTEMBER 19: Democratic Presidential candidate Senator Bernie Sanders (I-VT) talks on stage during the New Hampshire Democratic Party State Convention on September 19, 2015 in Manchester, New Hampshire. Five Democratic presidential candidates are all expected to address the crowd inside the Verizon Wireless Arena. (Photo by Scott Eisen/Getty Images)
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"We are making significant inroads in Secretary Clinton's lead and ... we have a path to victory," Sanders told cheering, chanting supporters in Madison, Wisconsin. "It is hard for anybody to deny that our campaign has the momentum."
Clinton, the former secretary of state, has increasingly turned her attention toward a potential Nov. 8 general election showdown against Republican front-runner Donald Trump, claiming she is on the path to wrapping up the nomination.
Heading into Saturday, she led Sanders by about 300 pledged delegates in the race for the 2,382 delegates needed to be nominated at the party's July convention in Philadelphia. Adding in the support of superdelegates - party leaders who are free to back any candidate - she has 1,690 delegates to 946 for Sanders.
Sanders, a U.S. senator from Vermont, needs to win up to two-thirds of the remaining delegates to catch Clinton, who will keep piling up delegates even when she loses under a Democratic Party system that awards them proportionally in all states.
"These wins will help him raise more funds for the next few weeks but I don't think it changes the overall equation," said Democratic strategist Jim Manley, a Clinton supporter. "Hillary Clinton has too big a lead."
But Sanders has repeatedly said he is staying in the race until the convention, pointing to big crowds at his rallies and high turnout among young and first-time voters as proof of his viability. After raising $140 million, he has the money to fight on as long as he wants.
He has energized the party's liberal base and young voters with his calls to rein in Wall Street and fight income inequality, a message that resonated in liberal Washington and other Western states. Sanders won in Utah and Idaho this week.
"Don't let anybody tell you we can't win the nomination or the general election," Sanders told supporters in Wisconsin, which holds the next contest on April 5. "We are going to do both."
All three contests on Saturday were caucuses, a format that has favored Sanders because it requires more commitment from voters. They also were in states with fewer of the black and Hispanic voters who have helped fuel Clinton's lead.
"He was just more aligned with my values. I am young and I never knew there could be someone like him in politics," said Samantha Burton of Seattle, who said Sanders was the first candidate who had inspired her to make a donation.
Jocelyn Alt, a birthing assistant at a Seattle hospital, said she backed Clinton because she believed the times called for someone who could get things done.
"She knows how to make things happen," she said. "I think Hillary is more likely to win against a Republican."
After Wisconsin, the Democratic race moves to contests in New York on April 19 and a bloc of five states in the Northeast, led by Pennsylvania, on April 26.
There were no contests on Saturday in the Republican race featuring Trump and rivals U.S. Senator Ted Cruz of Texas and Ohio Governor John Kasich.
On Saturday, the New York Times published a lengthy foreign policy-focused interview with Trump. The New York billionaire told the newspaper he might stop oil purchases from Saudi Arabia unless they provide troops to fight the Islamic State.
Trump also told the Times he was willing to rethink traditional U.S. alliances should he become president.
See photos of Bernie Sanders' supporters below:
Bernie Sanders supporters
US Democrat Bernie Sanders wins Alaska, Washington caucuses
A supporter sports a t-shirt with a montage of photographs of Senator Bernie Sanders, an independent from Vermont and 2016 Democratic presidential candidate, during a mock caucus at Drips coffee shop in Council Bluffs, Iowa, U.S., on Tuesday, Jan. 26, 2016. Hoping to persuade undecided Democrats with just a week until the Iowa caucuses, Hillary Clinton and Bernie Sanders took on some of the questions that have most dogged their candidacies, from trustworthiness and e-mails to feasibility and socialism. Photographer: T.J. Kirkpatrick/Bloomberg via Getty Images
Ben Cohen, left, and Jerry Greenfield, co-founders of Ben & Jerry's Homemade Holdings Inc., talk to supporters during a mock caucus at Drips coffee shop in Council Bluffs, Iowa, U.S., on Tuesday, Jan. 26, 2016. Hoping to persuade undecided Democrats with just a week until the Iowa caucuses, Hillary Clinton and Bernie Sanders took on some of the questions that have most dogged their candidacies, from trustworthiness and e-mails to feasibility and socialism. Photographer: T.J. Kirkpatrick/Bloomberg via Getty Images
A supporter of Democratic Presidential Candidate Bernie Sanders listens during a campaign event at the University of Northern Iowa in Cedar Falls, Iowa, January 24, 2016, ahead of the Iowa Caucus. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
UNITED STATES - JANUARY 22: A supporter of presidential candidate Sen. Bernie Sanders, I-Vt., shows off buttons during a campaign rally at Bedford High School in Bedford, N.H., January 22, 2016. (Photo By Tom Williams/CQ Roll Call)
UNITED STATES - JANUARY 22: Supporters of presidential candidate Sen. Bernie Sanders, I-Vt., listen to him speak during a campaign rally at Bedford High School in Bedford, N.H., January 22, 2016. (Photo By Tom Williams/CQ Roll Call)
BIRMINGHAM, AL - JANUARY 18: Cassidy Lamb waves a sign before Democratic presidential candidate Sen. Bernie Sanders (I-VT) arrives to a campaign rally at Boutwell Auditorium, January 18, 2016 in Birmingham, Alabama. Sanders spoke to a capacity crowd of around 5,000 supporters. (Photo by Hal Yeager/Getty Images)
MARSHALLTOWN, IA - JANUARY 10: Marc Daniels, of Springfield, Illinois, travels from one campaign event to another selilng what he calls 'Presidential Yarmulkes.' He is wearing a yarmulke printed with the phrase, 'Bernie Sanders 2016,' in Hebrew. Daniels was a guest at a campaign event for Democratic presidential candidate and U.S. Sen. Bernie Sanders (I-VT) on January 10, 2016 in Marshalltown, Iowa. Sanders drew an overflow crowd to the 600 person capacity meeting room of the Best Western Regency Inn in Marshalltown. Both Republican and Democratic presidential candidates have been making appearances at events across Iowa to build support in advance of the 2016 Iowa Caucuses. (Photo by Charles Ledford/Getty Images)
BURLINGTON, VT - JANUARY 07: A Bernie Sanders supporter holds up a pair of 'Bernie Briefs' in a local bar on January 7, 2016 in Burlington, Vermont. The line to see Republican Party presidential candidate Donald Trump's campaign rally wrapped around the venue and down multiple streets and multiple groups of protesters were. (Photo by Robert Nickelsberg/Getty Images)
DES MOINES, IA - NOVEMBER 14: John Jarecki wears a puppet of Democratic presidential candidate Senator Bernie Sanders (I-VT) to show his support for the candidate prior to the start of the Democratic presidential debate at Drake University on November 14, 2015 in Des Moines, Iowa. The debate will be the second for the democratic candidates seeking the nomination for president. (Photo by Scott Olson/Getty Images)
A woman wearing a hat with a sign in support of Senator Bernie Sanders, an independent from Vermont and 2016 Democratic presidential candidate, stands at a rally ahead of the Democratic presidential candidate debate at Drake University in Des Moines, Iowa, U.S., on Saturday, Nov. 14, 2015. The second Democratic debate, hosted by CBS News, KCCI and the Des Moines Register, is the Democratic National Committees only sanctioned debate in Iowa prior to the states first-in-the-nation caucuses on Feb. 1. Photographer: Daniel Acker/Bloomberg via Getty Images