Poll: Neck-and-neck 2016 races in Iowa, New Hampshire

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Bernie Sanders Neck and Neck with Hillary Clinton in Iowa

Three weeks until the first presidential nominating contest, Donald Trump and Ted Cruz are running neck and neck in Iowa, while Hillary Clinton and Bernie Sanders are also locked in a tight race in the Hawkeye State.

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What's more, Clinton and Sanders are within the margin of error in New Hampshire, while Trump has built a 16-point lead in the same state.

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Bernie Sanders on the campaign trail
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Poll: Neck-and-neck 2016 races in Iowa, New Hampshire
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)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt, pumps his fist as he arrives for at a rally at the Macomb Community College, Saturday, March 5, 2016, in Warren, Mich. (AP Photo/Carlos Osorio)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt, speaks at the FOX News town hall at the Gem Theatre, Monday, March 7, 2016, in Detroit. (AP Photo/Carlos Osorio)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., waves as he leaves a news conference after voting in the Vermont primary at the Robert Miller Community and Recreation Center in Burlington, Vermont, Tuesday, March 1, 2016, on Super Tuesday. (AP Photo/Jacquelyn Martin)???
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., right, and his wife, Jane arrive for a rally in Norfolk, Va., Tuesday, Feb. 23, 2016. (AP Photo/Steve Helber)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt. smiles while speaking at the Kansas City Convention Center during a campaign event in Kansas City, Mo., Wednesday, Feb. 24, 2016. (AP Photo/Jacquelyn Martin)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., right, meets 3-month-old Oliver Lomas, of Venice, Calif., who was dressed as Sanders during a rally at Bonanza High School, on Sunday, Feb. 14, 2016, in Las Vegas. (AP Photo/Evan Vucci)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt. speaks during a canvass kick-off event at the Reno Sparks Convention Center, Saturday, Feb. 13, 2016, in Reno, Nev. (AP Photo/Evan Vucci)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks to a crowd outside of a rally at Bonanza High School, on Sunday, Feb. 14, 2016, in Las Vegas. (AP Photo/Evan Vucci)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., boards his plane for a campaign rally in Las Vegas, on Sunday, Feb. 14, 2016, in Denver. (AP Photo/Evan Vucci)
The Rev. Al Sharpton talks with Democratic presidential candidate Sen. Bernie Sanders, I-Vt. as they sit down for a breakfast meeting at Sylvia's Restaurant, Wednesday, Feb. 10, 2016, in the Harlem neighborhood of New York. Sanders defeated former Secretary of State Hillary Clinton on Tuesday in the New Hampshire primary. (AP Photo/Richard Drew)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., reacts to the cheering crowd at his primary night rally Tuesday, Feb. 9, 2016, in Manchester, N.H. (AP Photo/J. David Ake)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., poses for a selfie during a campaign rally on Sunday, Jan. 31, 2016, in Waterloo, Iowa. (AP Photo/Evan Vucci)
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)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., speaks during a CNN town hall at Drake University in Des Moines, Iowa, Monday, Jan. 25, 2016. (AP Photo/Patrick Semansky)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt. jokes with members of the media and pretends to slip as he steps off his bus before speaking at a town hall, Tuesday, Jan. 19, 2016, at Santa Maria Winery in Carroll, Iowa. (AP Photo/Andrew Harnik)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., leaves after speaking to a crowded room during a campaign stop Monday, Jan. 18, 2016, in Birmingham, Ala. (AP Photo/Brynn Anderson)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., center, is joined by his wife Jane, right, and grandchildren, Dylan, 4, and Ella, 7, on stage after speaking at a town hall at the Orpheum Theater in Sioux City, Iowa, Tuesday, Jan. 19, 2016. (AP Photo/Andrew Harnik)
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)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., listens during a news conference on Capitol Hill in Washington, Thursday, Dec. 3, 2015, to discuss gun control and related amendments to the reconciliation bill. (AP Photo/Jacquelyn Martin)
Democratic presidential candidates Bernie Sanders at the NHDP annual Jefferson Jackson dinner in Manchester, N.H., Sunday, Nov. 29, 2015. (AP Photo/Cheryl Senter)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., steps onstage to speak at a campaign event at the Fox Theatre, Monday, Nov. 23, 2015, in Atlanta. (AP Photo/David Goldman)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt. left, sits with rapper Killer Mike at The Busy Bee Cafe Monday, Nov. 23, 2015, in Atlanta. Killer Mike is scheduled to introduce Sanders at a campaign event at the Fox Theatre later in the evening. (AP Photo/David Goldman)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at a campaign event at the Fox Theatre Monday, Nov. 23, 2015, in Atlanta. (AP Photo/David Goldman)
The crowd cheers as Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at a campaign event at the Fox Theatre Monday, Nov. 23, 2015, in Atlanta. (AP Photo/David Goldman)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at a campaign event at the Fox Theatre Monday, Nov. 23, 2015, in Atlanta. (AP Photo/David Goldman)
Supporters for Democratic presidential candidate Sen. Bernie Sanders, I-Vt., cheer at the Jenkins Orphanage in North Charleston, S.C., Saturday, Nov. 21, 2015, during the Blue Jamboree event. (AP Photo/Mic Smith)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at Georgetown University in Washington, Thursday, Nov. 19, 2015, about the meaning of "democratic socialism" and other topics. (AP Photo/Carolyn Kaster)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., pauses to wipe his brow as he speaks at Georgetown University in Washington, Thursday, Nov. 19, 2015, about the meaning of "democratic socialism" and other topics. (AP Photo/Carolyn Kaster)
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)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt, speaks during a campaign rally in Springfield, Mass., Saturday, Oct. 3, 2105. (AP Photo/Michael Dwyer)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., speaks during the Des Moines Youth Summit, Sunday, Sept. 27, 2015, at Creative Visions in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
NEW YORK, NY - SEPTEMBER 18: Senator Bernie Sanders at Late Show with Stephen Colbert at the Ed Sullivan Theatre in New York City on September 18, 2015. Credit: RW/MediaPunch/IPX
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)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., waves as he marches with supporters in the Labor Day parade Monday, Sept. 7, 2015, in Milford, N.H. (AP Photo/Jim Cole)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., speaks during a television interview before a town hall meeting, Thursday, Sept. 3, 2015, in Grinnell, Iowa. (AP Photo/Charlie Neibergall)
Democratic presidential candidate, Sen. Bernie Sanders, I -Vt., reacts during a fundraiser reception Monday, Aug. 17, 2015, in Chicago. (AP Photo/Christian K. Lee)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., greets supporters during the opening of his Cedar Rapids field headquarters, Sunday, Aug. 16, 2015, in Marion, Iowa. (AP Photo/Charlie Neibergall)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at the Iowa at the Iowa State Fair Saturday, Aug. 15, 2015, in Des Moines. (AP Photo/Charlie Riedel)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at the Iowa Democratic Wing Ding at the Surf Ballroom Friday, Aug. 14, 2015, in Clear Lake, Iowa. (AP Photo/Charlie Riedel)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at a rally, Monday, Aug. 10, 2015, at the Los Angeles Memorial Sports Arena in Los Angeles. (AP Photo/Ringo H.W. Chiu)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., lifts his arms in celebration as he speaks at a rally, Sunday, Aug. 9, 2015, at the Moda Center in Portland, Ore. (AP Photo/Troy Wayrynen)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., during a visit to the National Nurses United office Monday, Aug. 10, 2015, in Oakland, Calif. (AP Photo/Eric Risberg)
A supporter takes a photo with Democratic presidential candidate Sen. Bernie Sanders, I-Vt., left, at a rally, Sunday, Aug. 9, 2015, at the Moda Center in Portland, Ore. (AP Photo/Troy Wayrynen)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., smiles before a rally Saturday, Aug. 8, 2015, in downtown Seattle. The afternoon rally was the first of several weekend appearances by Sanders in Seattle and Portland. (AP Photo/Elaine Thompson)
Nurses take "selfies" with Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., after her spoke at a rally with registered nurses and other community leaders on the 50th anniversary of Medicare and Medicaid, Thursday, July 30, 2015, on Capitol Hill in Washington. (AP Photo/Jacquelyn Martin)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at the 2015 International Association of Sheet Metal, Air, Rail, and Transportation Workers (SMART) Conference, Tuesday, July 28, 2015, in Washington. (AP Photo/Jacquelyn Martin)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., joined by federal contract workers, speaks during a rally on Capitol Hill in Washington, Wednesday, July 22, 2015, to push for a raise to the minimum wage to $15 an hour. (AP Photo/Andrew Harnik)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., gives an opening statement at a Netroots Nation town hall meeting, Saturday, July 18, 2015, in Phoenix. (AP Photo/Ross D. Franklin)
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., waits to speak at the Alliance for Retired Americans 2015 National Legislative Conference in Washington, Thursday, July 9, 2015. (AP Photo/Molly Riley)
Sen. Bernie Sanders, I-Vt., speaks to the media about his agenda in running for president, Thursday, April 30, 2015, on Capitol Hill in Washington. (AP Photo/Jacquelyn Martin)
Democratic Presidential candidate Sen. Bernie Sanders, I-Vt., poses for a portrait before an interview, Wednesday May 20, 2015, in Washington. (AP Photo/Jacquelyn Martin)
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Those are the results of two brand-new NBC News/Wall Street Journal/Marist polls -- the first NBC/WSJ/Marist early-state surveys of 2016, which for the first time measure likely voters.

Three weeks until the first presidential nominating contest, Donald Trump and Ted Cruz are running neck and neck in Iowa, while Hillary Clinton and Bernie Sanders are also locked in a tight race in the Hawkeye State.

See more from the Hillary Clinton campaign:

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Hillary Clinton calls out heckler at New Hampshire Town Hall meeting
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Poll: Neck-and-neck 2016 races in Iowa, New Hampshire
Democratic presidential candidate Hillary Clinton takes a question during a town hall style campaign event Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
Democratic presidential candidate Hillary Clinton, right, greets people in the audience as she arrives at a town hall style campaign event Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
Marilyn Brennan, front, and Kathy Boselli, center, both of Bedford, N.H., hold placards and talk during a town hall style campaign event for Democratic presidential candidate Hillary Clinton, Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
Democratic presidential candidate Hillary Clinton addresses an audience during a town hall campaign event Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
Democratic presidential candidate Hillary Clinton addresses an audience during a town hall style campaign event Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
People applaud during a town hall campaign event for Democratic presidential candidate Hillary Clinton Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
Democratic presidential candidate Hillary Clinton addresses an audience during a town hall style campaign event Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
Hillary Clinton, former Secretary of State and 2016 Democratic presidential candidate, speaks during a town hall meeting at Keene High School in Keene, New Hampshire, U.S., on Sunday, Jan. 3, 2016. Democratic presidential front-runner Hillary Clinton on Saturday said she will unveil proposals this month that will go beyond the Buffett Rule to raise the effective tax rates paid by the wealthiest Americans. Photographer: Andrew Harrer/Bloomberg via Getty Images
Women in the audience at a town hall campaign event for Democratic presidential candidate Hillary Clinton use their mobile devices during the event Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
Democratic presidential candidate Hillary Clinton addresses an audience during a town hall campaign event Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
Hillary Clinton, former Secretary of State and 2016 Democratic presidential candidate, smiles while being introduced during a town hall meeting at Keene High School in Keene, New Hampshire, U.S., on Sunday, Jan. 3, 2016. Democratic presidential front-runner Hillary Clinton on Saturday said she will unveil proposals this month that will go beyond the Buffett Rule to raise the effective tax rates paid by the wealthiest Americans. Photographer: Andrew Harrer/Bloomberg via Getty Images
Democratic presidential candidate Hillary Clinton, right, greets members of the International Red Star Twirlers, from Derry, N.H., left, at the conclusion of a town hall style campaign event Sunday, Jan. 3, 2016, in Derry, N.H. (AP Photo/Steven Senne)
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What's more, Clinton and Sanders are within the margin of error in New Hampshire, while Trump has built a 16-point lead in the same state.

Those are the results of two brand-new NBC News/Wall Street Journal/Marist polls -- the first NBC/WSJ/Marist early-state surveys of 2016, which for the first time measure likely voters.

In Iowa, which holds its caucuses on Feb. 1, Ted Cruz leads Donald Trump by four points among likely caucus-goers, 28 percent to 24 percent - within the poll's margin of error of plus-minus 4.6 percentage points. They're followed by Marco Rubio at 13 percent and Ben Carson at 11 percent. No other Republican candidate gets more than 5 percent of the vote.

Yet among the larger universe of potential Iowa caucus-goers, Trump actually leads Cruz by two points, 26 percent to 24 percent, suggesting that a larger turnout could benefit Trump in the state. (Back in October's NBC/WSJ/Marist poll, Trump was at 24 percent among potential caucus-goers, Carson at 19 percent, and Cruz and Rubio at just 6 percent.)

On the Democratic side, frontrunner Hillary Clinton holds just a three-point lead among likely voters over Bernie Sanders, 48 percent to 45 percent, while Martin O'Malley gets 5 percent.

But among potential Democratic caucus-goers, Clinton's advantage grows to six points, 49 percent to 43 percent. (In October, Clinton's lead here was 11 points, 47 percent to 36 percent.)

New Hampshire: Four Establishment GOP candidates split up almost 45 percent of vote

In New Hampshire, which holds its presidential primaries on Feb. 9, Trump gets support from 30 percent of likely Republican primary voters.

He's followed by Marco Rubio at 14 percent, Chris Christie at 12 percent, Ted Cruz at 10 percent, and John Kasich and Jeb Bush tied at 9 percent each.

That means that the four Republicans vying in the establishment lane of the GOP contest - Rubio, Christie, Kasich and Bush - are dividing up 44 percent of the total vote, according to the NBC/WSJ/Marist poll.

The GOP numbers are essentially unchanged among the larger pool of potential Republican voters in New Hampshire.

In the Democratic race, Sanders is ahead of Clinton by four points among likely primary voters, 50 percent to 46 percent, which is within the margin of error of plus-minus 4.8 percentage points. O'Malley is at 1 percent.

Among the larger universe of potential Democratic primary voters, Sanders' lead increases to six points, 50 percent to 44 percent. In October, the Vermont senator held a nine-point lead over Clinton.

Sanders outperforms Clinton in general-election matchups

The NBC/WSJ/Marist polls also show that Sanders outperforms Clinton in hypothetical general-election matchups in these two presidential battleground states - something other surveys have found, too.

26 PHOTOS
Bernie Sanders and Hillary Clinton duking it out during Democratic debates
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Poll: Neck-and-neck 2016 races in Iowa, New Hampshire
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt and Democratic presidential candidate, Hillary Clinton interrupt each other during the Univision, Washington Post Democratic presidential debate at Miami-Dade College, Wednesday, March 9, 2016, in Miami. (AP Photo/Wilfredo Lee)
Democratic presidential candidate, Hillary Clinton argues a point as Sen. Bernie Sanders, I-Vt., right, listens during a Democratic presidential primary debate at the University of Michigan-Flint, Sunday, March 6, 2016, in Flint, Mich. (AP Photo/Carlos Osorio)
Democratic presidential candidate, Hillary Clinton makes a point as Sen. Bernie Sanders, I-Vt, reatcs during a Democratic presidential primary debate at the University of Wisconsin-Milwaukee, Thursday, Feb. 11, 2016, in Milwaukee. (AP Photo/Morry Gash)
MILWAUKEE, WI - FEBRUARY 11: Democratic presidential candidate Senator Bernie Sanders (L) and Hillary Clinton participate in the PBS NewsHour Democratic presidential candidate debate at the University of Wisconsin-Milwaukee on February 11, 2016 in Milwaukee, Wisconsin.The debate is the final debate before the Nevada caucuses scheduled for February 20. (Photo by Win McNamee/Getty Images)
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., gestures towards Democratic presidential candidate, former Secretary of State Hillary Clinton during a democratic presidential primary debate at the Gaillard Center, Sunday, Jan. 17, 2016, in Charleston, S.C. (AP Photo/Mic Smith)
Democratic presidential candidate, Hillary Clinton, left, speaks at the NBC, YouTube Democratic presidential debate at the Gaillard Center, Sunday, Jan. 17, 2016, in Charleston, S.C. To the right is Democratic presidential candidate, Sen. Bernie Sanders, I-Vt. (AP Photo/Stephen B. Morton)
Democratic presidential candidate, Hillary Clinton and Democratic presidential candidate, Sen. Bernie Sanders, I-Vt. speak during a break at the NBC, YouTube Democratic presidential debate at the Gaillard Center, Sunday, Jan. 17, 2016, in Charleston, S.C. (AP Photo/Mic Smith)
DURHAM, NH - FEBRUARY 04: Democratic presidential candidates former Secretary of State Hillary Clinton and U.S. Sen. Bernie Sanders (I-VT) during their MSNBC Democratic Candidates Debate at the University of New Hampshire on February 4, 2016 in Durham, New Hampshire. This is the final debate for the Democratic candidates before the New Hampshire primaries. (Photo by Justin Sullivan/Getty Images)
Hillary Clinton, right, speaks to Bernie Sanders during a break at the Democratic presidential primary debate Saturday, Dec. 19, 2015, at Saint Anselm College in Manchester, N.H. (AP Photo/Jim Cole)
Bernie Sanders, left, offers an apology to Hillary Clinton during a Democratic presidential primary debate Saturday, Dec. 19, 2015, at Saint Anselm College in Manchester, N.H. (AP Photo/Jim Cole)
Bernie Sanders, left, speaks to Hillary Clinton after a Democratic presidential primary debate Saturday, Dec. 19, 2015, at Saint Anselm College in Manchester, N.H. (AP Photo/Jim Cole)
Bernie Sanders, left, makes a point as Hillary Rodham Clinton listens during a Democratic presidential primary debate, Saturday, Nov. 14, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Hillary Rodham Clinton, right, walks by Bernie Sanders during a commercial break at a Democratic presidential primary debate, Saturday, Nov. 14, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
FILE - In this Nov. 14, 2015, file photo, Bernie Sanders makes a point during a Democratic presidential primary debate in Des Moines, Iowa. The Democratic presidential candidates are meeting for their third debate on Dec. 19, with tensions suddenly boiling between Hillary Clinton and her chief rival, Sanders. (AP Photo/Charlie Neibergall, File)
Democratic presidential candidates Hillary Rodham Clinton, left, Bernie Sanders and Martin O'Malley appear before a Democratic presidential primary debate, Saturday, Nov. 14, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
Hillary Rodham Clinton, right, and Sen. Bernie Sanders, of Vermont, speak during the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)
Democratic presidential candidates from left, former Virginia Sen. Jim Webb, Sen. Bernie Sanders, of Vermont, Hillary Rodham Clinton, former Maryland Gov. Martin O'Malley, and former Rhode Island Gov. Lincoln Chafee take the stage before the CNN Democratic presidential debate Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
Senator Bernie Sanders, an independent from Vermont, left, and Hillary Clinton, former U.S. secretary of state, participate in the first Democratic presidential debate at the Wynn Las Vegas resort and casino in Las Vegas, Nevada, U.S., on Tuesday, Oct. 13, 2015. While tonight'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: Josh Haner/Pool via Bloomberg
Sen. Bernie Sanders, of Vermont,, left, and Hillary Rodham Clinton laugh during the CNN Democratic presidential debate, Tuesday, Oct. 13, 2015, in Las Vegas. (AP Photo/John Locher)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton shake hands at the end of a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT) (L) and Hillary Clinton take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 13: (L-R) Democratic presidential candidates U.S. Sen. Bernie Sanders (I-VT), Hillary Clinton and Martin O'Malley take part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - October 13: Bernie Sanders and Hillary Clinton pictured at the 2015 CNN Democratic Presidential Debate at Wynn Resort in Las Vegas, NV on October 13, 2015. Credit: Erik Kabik Photography/ MediaPunch/IPX
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In Iowa:

  • Clinton leads Trump by eight points among registered voters (48 percent to 40 percent), but Sanders is ahead of him by 13 (51 percent to 38 percent);
  • Cruz tops Clinton by four points (47 percent to 43 percent), but Sanders beats him by five (47 percent to 42 percent);
  • And up Rubio is up by five points over Clinton (47 percent to 42 percent), while he's tied with Sanders (44 percent to 44 percent).

In New Hampshire:

  • Clinton is ahead of Trump by just one point (45 percent to 44 percent), but Sanders tops him by 19 points (56 percent to 37 percent);
  • Cruz beats Clinton by four points (48 percent to 44 percent), but Sanders leads him by another 19 points (55 percent to 36 percent);
  • And Rubio bests Clinton by 12 points (52 percent to 40 percent), while Sanders leads him by nine points (50 percent to 41 percent).
The primary reason why Sanders tests better in these general-election matchups is due to his stronger performance with independent voters.

The NBC/WSJ/Marist polls were conducted Jan. 2-7. In Iowa, the poll measured 2,821 registered voters (+/- 1.8), 1,094 potential GOP caucus-goers (+/- 3.0%), 456 likely GOP caucus-goers (+/- 4.6%), 977 potential Democratic caucus-goers (+/- 3.1%) and 422 likely Dem caucus-goers (+/- 4.8%)

In New Hampshire, the poll measured 1,888 registered voters (+/- 2.3%), 887 potential GOP primary voters (+/- 3.3%), 569 likely GOP primary voters (+/- 4.1%), 690 potential Dem primary voters (+/- 3.7%) and 425 likely Dem primary voters (+/- 4.8%).

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