Sen. Bob Corker admonished President Donald Trump on Sunday after the president lashed out at him
"It's a shame the White House has become an adult day care center. Someone obviously missed their shift this morning," wrote Corker, the Republican senator from Tennessee.
Senator Bob Corker "begged"... @ Donald J. Trump
..my endorsement). He also ... @ Donald J. Trump
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...Hence, I would fully exp... @ Donald J. Trump
Despite lobbying from top Republicans including Senate Majority Leader Mitch McConnell, Corker decided against running for reelection as polls indicated he may have been vulnerable to a Republican primary challenger.
Some on the right, like former White House chief strategist Steve Bannon, were considering backing a primary opponent.
Sunday's clash online was just the latest public spat in a relationship that has deteriorated significantly since Trump flirted with tapping Corker to be his 2016 running mate and nominating Corker to a cabinet position.
In May, the chairman of the Ssaid the White House was in a "downward spiral" following reports that Trump had revealed highly sensitive intelligence to Russian officials.
In August, Corker criticized President Donald Trump's comments about white-nationalist protesters in Charlottesville, Virginia, saying Trump "has not demonstrated he understands the character of this nation."
And criticized Trump for undermining Secretary of State Rex Tillerson's efforts