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UNITED STATES - JANUARY 29 - Sen. Charles Grassley, R-Iowa, claps as he is recognized by Republican presidential candidate Ted Cruz, during a campaign stop, Friday, Jan. 29, 2016, in Wilton, Iowa.  (Photo By Al Drago/CQ Roll Call)

UNITED STATES - JANUARY 29 - Sen. Charles Grassley, R-Iowa, claps as he is recognized by Republican presidential candidate Ted Cruz, during a campaign stop, Friday, Jan. 29, 2016, in Wilton, Iowa. (Photo By Al Drago/CQ Roll Call)

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