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.
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.
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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?
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.
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