Bernie Sanders and Donald Trump deliver victory speeches at their respective watch parties in New Hampshire. Jewel Samad/AFP; Joe Raedle/Getty Images hide caption

toggle caption Jewel Samad/AFP; Joe Raedle/Getty Images

Republican Chris Christie of New Jersey has invested nearly his entire campaign on New Hampshire. A poor result will almost certainly effectively end his candidacy. Robert F. Bukaty/AP hide caption

toggle caption Robert F. Bukaty/AP

Thanks to the current nomination calendar, U.S. presidential candidates (like Chris Christie, pictured at the 2015 Iowa State Fair) get lots of practice at flipping pork chops. Scott Olson/Getty Images News hide caption

toggle caption Scott Olson/Getty Images News

Students from Manchester University visit the caucus exhibit at Iowa's state museum in Des Moines Scott Detrow/NPR hide caption

toggle caption Scott Detrow/NPR

Politics 101: A College Class Gets Up Close And Personal With The Iowa Caucuses

  • Download
  • <iframe src="https://www.npr.org/player/embed/463869241/464090974" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Republican presidential candidate Sen. Marco Rubio, R-Fla. holds a rifle during a campaign stop Jan. 15, 2016, at Sturm, Ruger & Co., in Newport, N.H. Matt Rourke/AP hide caption

toggle caption Matt Rourke/AP

Establishment Republicans Scramble To Top Trump

  • Download
  • <iframe src="https://www.npr.org/player/embed/463290751/463290752" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Republican presidential candidate and New Jersey Gov. Chris Christie campaigns in Manchester, N.H., in August. Michael Dwyer/AP hide caption

toggle caption Michael Dwyer/AP

PAC Supporting Christie Scoops Up Voter Data Across New Hampshire

  • Download
  • <iframe src="https://www.npr.org/player/embed/459936083/459936084" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

An American soldier carrying equipment walks past an American flag at Incirlik Air Base in Adana, Turkey, as U.S. Air Force war planes are used against ISIS. Anadolu Agency/Getty Images hide caption

toggle caption Anadolu Agency/Getty Images

Republican presidential candidate and New Jersey Gov. Chris Christie and his wife Mary Pat Christie in Londonderry, NH on Tuesday. Allegra Boverman/NHPR hide caption

toggle caption Allegra Boverman/NHPR

In Wake Of Paris Attacks, Chris Christie Sees An Opportunity

  • Download
  • <iframe src="https://www.npr.org/player/embed/458059894/458065068" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Marco Rubio (center) was able to stand out even while being targeted by Jeb Bush (left), someone once described as a mentor. Donald Trump looks on. Mark J. Terrill/AP hide caption

toggle caption Mark J. Terrill/AP

Preparations underway in the Media Center at the third Republican debate on the campus of the University of Colorado in Boulder, Colo. Robyn Beck/AFP/Getty Images hide caption

toggle caption Robyn Beck/AFP/Getty Images

Nurse Kaci Hickox speaks to the media last year outside her home in Fort Kent, Maine. Hickox, who sharply protested being quarantined at a New Jersey hospital in 2014 after she returned from treating Ebola patients in West Africa, has filed a lawsuit against the state of New Jersey. Robert F. Bukaty/AP hide caption

toggle caption Robert F. Bukaty/AP

Donald Trump speaks to the media at the U.S.-Mexico border in July. The Libre Initiative's letter doesn't call out any candidates by name, but Trump has called for mass deportation and an end to birthright citizenship for immigrants. LM Otero/AP hide caption

toggle caption LM Otero/AP

Donald Trump arrives at the National Federation of Republican Assemblies on Saturday in Nashville, Tenn., ahead of his speech before the conservative group. Mark Humphrey/AP hide caption

toggle caption Mark Humphrey/AP

The 'Trump Effect' Alienating Conservative Latinos

  • Download
  • <iframe src="https://www.npr.org/player/embed/435584004/436229392" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Students protest the rising costs of college loans in Los Angeles in 2012. Citing bank bailouts, the protesters called for student debt cancellations. David McNew/Getty Images hide caption

toggle caption David McNew/Getty Images

Fact Check: Is Refinancing Student Debt Really Good Policy?

  • Download
  • <iframe src="https://www.npr.org/player/embed/433257863/433402388" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript