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Sen. Bob Corker (R-Tenn.) is going head-to-head with President Trump again on Twitter, blasting the president as a liar. 

President Trump went after the Senate Foreign Relations Committee chairman, who has said he is not seeking re-election, on Twitter this morning.

That prompted Corker, who made headlines just weeks ago for likening the White House to an "adult day care center," to call out Trump once again. 

But Corker's comeback did not go unanswered by the President of the United States:

Corker has previously said he will not support a deficit-raising tax bill. He also said this morning that Trump should "leave it to the professionals" when it comes to tensions with North Korea.

On "America's Newsroom," Byron York of the Washington Examiner said Republicans need Trump to stay "all in, all the time" in order push tax reform over the finish line. 

After opposition from Democrats, Trump tweeted that he does not support changes to 401(k) plan contributions as part of the bill. 

Trump is set to meet with Republican senators at the White House later today.

UPDATE: Corker went even further in his criticism of Trump later on Tuesday morning, telling a CNN reporter that Trump "will be remembered for the debasement of our nation."

"I don’t know why he lowers himself to such a low, low standard," he said. 

Corker said he did not want to use the word "liar" to label the president, but said he tells "provable untruths." He said world leaders are aware that much of what Trump says is not true.

He said he would not support Trump again in a presidential campaign and the president is "absolutely" not a role model to children in America.

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UPDATE, 10:45am ET: After Corker's comments to CNN, Trump unleashed a flurry of new criticism, calling him "incompetent" as chair of the Foreign Relations Committee.