Poll: Clinton, Sanders neck-and-neck in Iowa, NH
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Sen. Bernie SandersBernard (Bernie) SandersOvernight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Senate passes 0B defense bill Dems fear lasting damage from Clinton-Sanders fight MORE (I-Vt.) has maintained his lead over Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonBiden slams Trump over golf gif hitting Clinton Overnight Cybersecurity: Equifax hit by earlier hack | What to know about Kaspersky controversy | Officials review EU-US privacy pact Overnight Tech: Equifax hit by earlier undisclosed hack | Facebook takes heat over Russian ads | Alt-right Twitter rival may lose domain MORE in New Hampshire and pulled to within the margin of error of her in Iowa, a new poll finds.

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According to a NBC News-Wall Street Journal-Marist survey released on Sunday, Clinton has only a 3-point lead over Sanders in Iowa, well within the poll’s 4.8 percentage point margin of error. Clinton takes 48 percent support in the Hawkeye State, compared to 45 percent for Sanders.

That’s a much closer race in Iowa than other recent polls have found. According to the RealClearPolitics average of surveys, Clinton leads by 12.5 points in Iowa.

New Hampshire has long been a more competitive race between the two, and here the poll found Sanders leading with 50 percent of the support over Clinton at 46, in-line with other recent polling. According to the RCP average, Sanders leads by 5.3 points in the Granite State.

The Sanders campaign has been seeking to draw attention to polling that finds the Vermont senator performing better than Clinton in head-to-head match-ups against Republicans in the general election, and the NBC survey confirmed those claims.

Sanders leads GOP front-runner Donald TrumpDonald John TrumpBiden slams Trump over golf gif hitting Clinton Trump Jr. declines further Secret Service protection: report Report: Mueller warned Manafort to expect an indictment MORE head-to-head by 13 in Iowa, while Clinton only leads him by 8. In New Hampshire the disparity is even greater, with Sanders leading Trump by 19, and Clinton only edging him by 1.

The poll produced similar findings in head-to-head match-ups against Sens. Ted CruzRafael (Ted) Edward CruzSenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Overnight Finance: CBO to release limited analysis of ObamaCare repeal bill | DOJ investigates Equifax stock sales | House weighs tougher rules for banks dealing with North Korea GOP state lawmakers meet to plan possible constitutional convention MORE (R-Texas) and Marco RubioMarco Antonio RubioOvernight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Senate passes 0B defense bill Trump bets base will stick with him on immigration MORE (R-Fla.).

The most stunning finding was in New Hampshire, where Rubio leads Clinton 12, but trails Sanders by 9.

Sanders is buoyed in the head-to-head match-ups with Republicans by his strength among independents.

The survey of 2,821 registered voters in Iowa has a 1.8 percentage point margin of error. The survey of 1,888 registered voters in New Hampshire has a 2.3 percentage point margin of error. The surveys of 422 likely Democratic caucus-goers in Iowa and 425 likely Democratic primary voters in New Hampshire have 4.8 percentage point margins of error.