Trump threatens 'unstable' Cruz with legal action
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GOP presidential front-runner Donald TrumpDonald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE on Monday threatened rival Ted CruzRafael (Ted) Edward CruzCrenshaw looms large as Democrats look to flip Texas House seat SCOTUS confirmation in the last month of a close election? Ugly The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' MORE with legal action if the Texas senator does not “take down his false ads and retract his lies.”


“Ted Cruz is a totally unstable individual,” Trump said in a statement. “He is the single biggest liar I’ve ever come across, in politics or otherwise, and I have seen some of the best of them. His statements are totally untrue and completely outrageous.”

"Cruz has become unhinged and is lying with the hopes that his statements will go unchecked until after the election and he will save his failing campaign," Trump added.

Trump said one way he can fight back is to bring a lawsuit against Cruz “relative to the fact that he was born in Canada and therefore cannot be President.”

Trump also called on the Republican National Committee to intervene, saying the RNC would be “in default of their pledge to me” if it doesn’t act.

Cruz fired back on Twitter, saying he is pointing out Trump's "actual positions."

At a press conference on Monday, Trump reiterated his threat, again calling Cruz "unstable" and saying he will bring a lawsuit if Cruz doesn't "straighten his act out."

"What Cruz says is incredible. I've never seen anything like it," he told reporters.

Trump said he's been accused by Cruz of being against the Second Amendment, of being in favor of Obamacare and of being pro-abortion — all of which Trump said isn't true.

Trump repeatedly called Cruz a liar and vowed to not let the senator get away with his statements.

"I have never ever met a person that lies more than Ted Cruz," he said.

"I have a very good lawyer, already hired," Trump added.

This report was updated at 3:02 p.m.