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Donald Trump and Ted Cruz traded barbs in separate Fox News Sunday interviews today over former heavyweight boxing champion Mike Tyson's endorsement of the billionaire real estate mogul.

Cruz played up Tyson's 1992 rape conviction in presenting the choice to Indiana voters between Trump and himself.

"And you want a contrast of this entire race," Cruz said, "it is Donald and Mike Tyson, a convicted rapist, versus me standing with Carly Fiorina and (Gov.) Mike Pence."

Trump said Cruz's comment "just shows what a liar he is," saying that he hadn't seen Tyson in years and that the boxer endorsed him "over the Internet."

"So Cruz is now saying, 'Oh, he was a rapist,'" Trump said. "This guy is a real liar, that's why we call him Lyin' Ted Cruz. I mean, the greatest liar that ever lived except he gets caught every time."

Trump said that after this interview he'd be heading to Indiana, where he would rally with former Indiana University basketball coach Bobby Knight -- who endorsed him this week -- and "other people that are unbelievable."

He added that he believed Pence "gave me more of an endorsement than he gave Cruz."

"He started off with 'Donald Trump and what a great job he's done.' I mean look, his donors and special interests obviously made him give an endorsement."

Watch Chris Wallace's interview with Ted Cruz above.

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