Republican primary front-runner Donald TrumpDonald John TrumpNew EPA rule would expand Trump officials' powers to reject FOIA requests Democratic senator introduces bill to ban gun silencers Democrats: Ex-Commerce aide said Ross asked him to examine adding census citizenship question MORE on Sunday blasted GOP presidential rival Ted CruzRafael (Ted) Edward Cruz Hickenlooper, Bennet bring deep ties to 2020 debate stage 2020 Democrat Bennet releases comprehensive government reform plan GOP frets about Trump's poll numbers MORE as a “total liar.”

“Look, Ted Cruz is a total liar,” Trump said on ABC’s “This Week,” responding to an ad accusing the billionaire businessman of supporting ObamaCare. “I am so against ObamaCare. I’ve been saying it for two years in speeches, I’m going to repeal and replace ObamaCare. I don’t even know where he gets this.”

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Trump also pointed to Cruz’s failure to disclose a pair of loans from Citibank and Goldman Sachs used in his 2012 Senate run.

“But he’s a liar,” he said. “He didn’t even put down on his financial disclosure forms that he borrowed money from banks at low interest loans, lower than you could get, lower than anybody could get.”

“I mean, look, Ted is a liar,” he added. “That’s why nobody likes him. This is why he doesn’t have one endorsement from one senator, not one. He works with these senators, he doesn’t have one endorsement.”

When host George Stephanopoulos pushed back that Trump had not been endorsed by a senator, the businessman responded: “They will be very soon. You watch.”