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Republican presidential candidate Donald Trump (R) gestures towards  Ted Cruz (L) during the CBS News Republican Presidential Debate in Greenville, South Carolina, February 13, 2016.  / AFP / JIM WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)
Republican presidential candidate Donald Trump (R) gestures towards  Ted Cruz (L) during the CBS News Republican Presidential Debate in Greenville, South Carolina, February 13, 2016.  / AFP / JIM WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)

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    Trump escalates rhetoric on Cruz

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Trump escalates rhetoric on Cruz

Donald Trump unleashed a series of insults against Sen. Ted Cruz, calling Cruz a liar who is "unhinged" and threatening again to file a lawsuit against Cruz over his citizenship.

Trump escalates rhetoric on Cruz

Donald Trump unleashed a series of insults against Sen. Ted Cruz, calling Cruz a liar who is "unhinged" and threatening again to file a lawsuit against Cruz over his citizenship.