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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Donald Trump and Russian President Vladimir Putin have exchanged compliments. In the words of one Putin adviser, "he more carefully listens to so-called 'silent majority' of the American nation, who don't want conflict with Russia." Robert F. Bukaty/AP hide caption

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Former first lady Barbara Bush, mother of Republican presidential candidate Jeb Bush, campaigns with her son at a town hall meeting at West Running Brook Middle School in Derry, N.H. Jacquelyn Martin/AP 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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Texas Sen. Ted Cruz speaks during the 2015 Iowa Faith & Freedom Coalition presidential forum. He's made religion a central tenet of his campaign for the Republican presidential nomination. Bloomberg/Bloomberg via Getty Images 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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