Scarborough: Trump so ‘out of it’ he doesn’t know how much he damaged his presidency

MSNBC's Joe Scarborough on Monday said President TrumpDonald John TrumpEsper sidesteps question on whether he aligns more with Mattis or Trump Warren embraces Thiel label: 'Good' As tensions escalate, US must intensify pressure on Iran and the IAEA MORE doesn't realize how much damage he did to his presidency when he attacked Sen. Bob CorkerRobert (Bob) Phillips CorkerTrump announces, endorses ambassador to Japan's Tennessee Senate bid Meet the key Senate player in GOP fight over Saudi Arabia Trump says he's 'very happy' some GOP senators have 'gone on to greener pastures' MORE (R-Tenn.).

“This is the thing he doesn’t understand — I mean this, the president is so out of it, he doesn’t understand,” Scarborough said.

“That if you attack Bob Corker, a guy who started a business on his own, became unbelievably successful in his 30s, has always been a success, a mayor, two-term senator."

Corker isn't "scared" of the president, Scarborough said.

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"He’s got nothing to lose. The damage that Donald Trump did additionally to his presidency yesterday is unspeakable," Scarborough said, adding that Trump has lost a vote on tax reform.

"If impeachment does come up, I wouldn't be surprised if Bob Corker and John McCainJohn Sidney McCainThe peculiar priorities of Adam Schiff Ocasio-Cortez fires back at Lindsey Graham: 'Graham wants to bring back 1950s McCarthyism' Meghan McCain knocks Lindsey Graham for defending Trump's tweets: 'This is not the person I used to know' MORE and Susan CollinsSusan Margaret CollinsGOP put on the back foot by Trump's race storm GOP senator: 'Outrageous' to say Trump's tweets about Democratic congresswomen are racist Fox personalities blast Trump's remarks MORE and Lisa MurkowskiLisa Ann MurkowskiGOP senator: 'Outrageous' to say Trump's tweets about Democratic congresswomen are racist Fox personalities blast Trump's remarks Schumer blisters Republicans over response to Trump tweets: 'Where are you?' MORE and Jeff FlakeJeffrey (Jeff) Lane FlakeFlake urges Republicans to condemn 'vile and offensive' Trump tweets Flake responds to Trump, Jimmy Carter barbs: 'We need to stop trying to disqualify each other' Jeff Flake responds to Trump's 'greener pastures' dig on former GOP lawmakers MORE and all of these Republicans that he's going after, if he's, again, not sealing his own fate," he said.

His comments come after Trump feuded with Corker this weekend, taking aim at the Tennessee Republican over Twitter.

Trump said Corker begged him to endorse his Senate bid, but Trump declined the request.

“Senator Bob Corker ‘begged’ me to endorse him for re-election in Tennessee. I said ‘NO’ and he dropped out (said he could not win without my endorsement),” Trump said. 

“He also wanted to be Secretary of State, I said ‘NO THANKS.’ He is also largely responsible for the horrendous Iran Deal!”

Corker's chief of staff, Todd Womack, on Sunday pushed back against Trump's claims.

"The president called Senator Corker on Monday afternoon and asked him to reconsider his decision not to seek reelection and reaffirmed that he would have endorsed him, as he has said many times," Womack said.

Corker said in a New York Times interview that Trump's threats to other countries could put the U.S. "on the path to World War III."