MSNBC’s Joe Scarborough Charles (Joe) Joseph ScarboroughScarborough calls on Cuomo to walk back statement he made about Trump: 'Out of bounds' Mika Brzezinski: 'Super grossed out' by Trump speech attendees 'who put their lives at risk' Democrats tear into Trump's 'deep state' tweet: His 'lies and recklessness' have 'killed people' MORE on Thursday sharply criticized Sen. John Kennedy John Neely KennedyMORE after the Louisiana Republican called Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) “dumb” at a rally the previous night.

Kennedy, during the rally headlined by President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE in support of gubernatorial candidate Eddie Rispone (R), referenced Pelosi proceeding with the House impeachment inquiry, saying, “I don’t mean any disrespect, but it must suck to be that dumb.”

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Scarborough, a former GOP congressman and vocal Trump critic, ripped into the comment on Thursday, asserting that the senator "actually does mean disrespect and he has degraded himself.”

“I just wonder how low these people are going to go ... how much they’re going to degrade themselves,” Scarborough said on MSNBC’s “Morning Joe.”

The MSNBC host argued that the remark would be a defining moment for Kennedy, who has come out to defend Trump amid the mounting impeachment investigation in the House focused on the president's dealings with Ukraine.

“By the way, senator, guess what? No matter what you do for the rest of your life, that’s your moment,” Scarborough said, adding "you did it for a man who committed crimes.”

Scarborough himself recently caught flak after he criticized attendees at a World Series game who had gone after the president by chanting "lock him up" at him. Trump was in attendance at the game.

The MSNBC host said that Americans “do not do that” and called it “un-American.” Social media users later defended the attendees' behavior, with “Sorry Joe” later trending on Twitter.