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Republican presidential candidates Ted Cruz (L)and Marco Rubio (R) applaud as fellow candidate Donald Trump (C) is introduced during the CBS News Republican Presidential Debate in Greenville, South Carolina, February 13, 2016.
Republican presidential candidates Ted Cruz (L)and Marco Rubio (R) applaud as fellow candidate Donald Trump (C) is introduced during the CBS News Republican Presidential Debate in Greenville, South Carolina, February 13, 2016.

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    Cruz, Rubio target Trump ahead of GOP debate

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Cruz, Rubio target Trump ahead of GOP debate

CNN's Jim Acosta reports.

Cruz, Rubio target Trump ahead of GOP debate

CNN's Jim Acosta reports.