President Trump on Tuesday claimed The New York Times set up Sen. Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE (R-Tenn.) to look like a fool — by recording an interview.

"The Failing @nytimes set Liddle' Bob Corker up by recording his conversation," Trump tweeted. "Was made to sound a fool, and that's what I am dealing with!"

The Failing @nytimes set Liddle' Bob Corker up by recording his conversation. Was made to sound a fool, and that's what I am dealing with! — Donald J. Trump (@realDonaldTrump) October 10, 2017

Corker ripped Trump in the interview, suggesting the president was unstable and that his threats to other countries risked putting the U.S. "on the path to World War III."

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It's typical for people to be recorded while giving interviews. Aides to Corker were on the same line when he made the remarks, according to the Times.

“Corker had 2 aides on line, also recording, and they made sure after it ended that I was taping, too,” Times reporter Jonathan Martin tweeted.

.@jmartNYT yday: "He called with two of his staffers on the line, one of them taping our phone call and he very much knew what he was doing" https://t.co/qiiHEyM03C — Catherine Valentine (@CNNValentine) October 10, 2017

Trump’s accusation escalates his feud with Corker, a onetime ally and an influential member of the upper chamber.

The president responded last weekend by claiming Corker had begged him for his endorsement but that he had declined.

Corker shot back, saying the White House had become "an adult day care center."

The spat could endanger Trump’s effort to pass an overhaul of the tax code. He can only afford to lose two GOP senators, and Corker told the Times that he would not support a plan that blows a hole in the federal budget.

Corker also chairs the Senate Foreign Relations Committee and could have a major say over the future of the Iran nuclear deal, which the president is expected to decertify in the coming days.

Trump often uses name-calling to belittle his foes. He first labeled Sen. Marco Rubio Marco Antonio RubioSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Florida senators pushing to keep Daylight Savings Time during pandemic Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll MORE (R-Fla.) “Little Marco” during the 2016 GOP presidential primary, and he often uses “Lyin’ Ted” to refer to Sen. Ted Cruz Rafael (Ted) Edward CruzVideo of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Democrat on Graham video urging people to 'use my words against me': 'Done' MORE (R-Texas), another primary rival.