MSNBC's Mika Brzezinski said Friday that President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE once gave her an "unbelievably inappropriate hug" while on the set of "Morning Joe" years ago.

The claim came during a discussion about former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE, who Brzezinski has staunchly defended amid allegations of inappropriate touching by seven women.

“Talk about somebody with boundary issues,” Brzezinski said of Trump. “Kind of makes me want to share the story about Trump’s unbelievably inappropriate hug in our studio.”

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Brzezinski didn't expand on the alleged incident, as co-host Joe Scarborough pivoted to Trump's sharing of a parody video mocking Biden on Thursday.

"The hypocrisy of that Joe Biden clip,” the former GOP congressman said of Trump. “Can you imagine the clip that’s going to follow that and the words that’s going to be put into the president’s mouth, probably with Billy Bush lurking around the back of his head, and Stormy Daniels and Playboy models?”

Trump, Brzezisnki and Scarborough were once on friendly terms, particularly when the then-GOP candidate appeared on the morning political program on a regular basis during the Republican primary season in 2015 and early 2016.

Critics even called the interviews conducted by the longtime "Morning Joe" hosts too friendly, but things appeared to sour after Trump captured the Republican nomination.

Trump has not appeared on the program or the network since May 2016.