Republican presidential candidates debate in Iowa days before caucus

Republican presidential candidates, from left, Jeb Bush, Sen. Ted Cruz and New Jersey Governor Chris Christie after the Fox News-Google GOP Debate Thursday at the Iowa Events Center in Des Moines. Residents of Iowa will vote for the Republican nominee at the caucuses on Feb. 1. Donald Trump, who is leading most polls in the state, decided not to participate in the debate.

Scott Olson / Getty Images
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