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Poll: Trump leads, but when it comes to second choice, Cruz is on top

Who stands to topple Donald Trump once the field narrows?

Republican presidential candidate U.S. Sen. Ted Cruz (R-TX) speaks at Charlie's Steakhouse on Jan. 4, 2016 in Carroll, Iowa. (Photo by Aaron P. Bernstein/Getty)
Republican presidential candidate U.S. Sen. Ted Cruz (R-TX) speaks at Charlie's Steakhouse on Jan. 4, 2016 in Carroll, Iowa.Getty Images

Susan Del Percio is a Republican strategist and a political analyst for MS NOW.

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