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

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Republican presidential candidates, from right, Ohio Gov. John Kasich, former Florida governor Jeb Bush and Sen. Marco Rubio, R-Fla., participate Jan. 28 in a GOP debate in Des Moines, Iowa. Rubio's strong third-place finish in Iowa has given him momentum and more backing from the same establishment Republicans that Bush and Kasich need for their campaigns to survive. Scott Olson/Getty Images hide caption

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Jeb Bush holds a campaign town hall meeting at the Alpine Club on Monday in Manchester, N.H. Chip Somodevilla/Getty Images hide caption

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Republican presidential candidate Marco Rubio speaks to a capacity crowd during a campaign event in Exeter, N.H. Steven Senne/AP hide caption

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Democratic presidential candidate Hillary Clinton speaks at a rally in Marshalltown, Iowa. Clinton is narrowly ahead of Sanders, but within the margin of error in the final Iowa poll. Andrew Harnik/AP hide caption

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Hillary Clinton at a campaign event in Davenport, Iowa. Clinton has seen the race in Iowa tighten but is hoping for a boost from the endorsement of the state's largest newspaper. Brendan Hoffman/Getty Images hide caption

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

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Politics

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

College students from Manchester University in Indiana share what they learned about the Iowa Caucuses.

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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

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Donald Trump (left) and Ted Cruz joke about Trump's comments that Cruz was a "maniac" and didn't have the right temperament to be president. They played nice then, but will they again? John Locher/AP hide caption

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William Gordon, left, helps Steve Wrona as he looks at guns while visiting the K&W Gunworks store in Delray Beach, Fla., on Tuesday, the day President Obama announced executive action on guns. Joe Raedle/Getty Images hide caption

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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

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