Republican Candidates Take Part In Debates At Reagan Library In Simi Valley [Getty Images]

SIMI VALLEY, CA - SEPTEMBER 16: Republican presidential candidates (L-R) U.S. Sen. Ted Cruz (R-TX), Ben Carson, Donald Trump and Jeb Bush participate in the presidential debates at the Reagan Library on September 16, 2015 in Simi Valley, California. Fifteen Republican presidential candidates are participating in the second set of Republican presidential debates. (Photo by Justin Sullivan/Getty Images)

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