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.
Democratic presidential candidate Hillary Clinton (left) hugs Annette Bebout, 73, of Newton, during a campaign event at Berg Middle School, in Newton, Iowa, this week. Bebout told her story to the audience of how she lost her home.
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.
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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.
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Democratic presidential candidate Hillary Clinton speaks during a town hall meeting at Keota High School, Tuesday, Dec. 22, 2015, in Keota, Iowa. Clinton has come under fire for her latest attempt at Latino outreach.