GOP Presidential Candidate Sen. Ted Cruz (R-TX) Campaigns Ahead Of Iowa Caucus [Getty Images]

AMES, IA - JANUARY 30: Republican presidential candidate Sen. Ted Cruz (R-TX) speaks at a campaign event at the Gateway Hotel on January 30, 2016 in Ames, Iowa. The Democratic and Republican Iowa Caucuses, the first step in nominating a presidential candidate from each party, will take place on February 1. (Photo by Brendan Hoffman/Getty Images)

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