MSNBC's Joe Scarborough, one day after President Donald Trump attacked him through Twitter, called on the president's cabinet to invoke the 25th Amendment and accused Trump of being "detached from reality."

"We are going to have a ground war in North Korea, they have believed that in the White House for a very long time — and yet, he is completely detached from reality," Scarborough said during a lengthy panel discussion on his "Morning Joe" program.

"The question is, if this is not what the 25th Amendment was drafted for — I would like the Cabinet members serving America, not the president, serving America," Scarborough added, later commenting that "everybody around Donald Trump now knows he's not stable."

He pointed to a series of tweets the president posted on Wednesday, while not mentioning one in which the president referred to the "unsolved mystery" of an intern who had been found dead in Scarborough's congressional office in Florida.

In 2001, just after Scarborough announced he was resigning from Congress, his constituent-services director Lori Klausutis, 28, was found dead at his Florida office. It was ruled she had a heart condition, collapsed, and struck her head on her desk.

While some conspiracy theorists have suggested over the years Scarborough might have had something to do with the death, no evidence has ever been presented to support that claim.

Instead, Scarborough and the morning program focused on Trump's decision to retweet three unverified anti-Muslim videos from the account of a British supremacy leader.

Trump's cabinet, said Scarborough, should know they serve America and not Trump, "scam developer, Trump University proprietor, reality TV show host, you don’t represent him. You represent 320 million people whose lives are literally in your hands, and we are facing a showdown with a nuclear power and have you somebody inside the White House, somebody that the New York Daily News says is mentally unfit."

Scarborough also claimed that during the 2016 people close to Trump told him that the New York real estate developer had "early stages of dementia."

"Now, listen, you can get mad at me," said Scarborough. "When are we supposed to say this? After the first nuclear missile goes? Is that when it’s proper to bring this up in polite society? Tell me."

Scarborough's co-host Mika Brzezinski later added that she's been trying to talk about the claims, but claimed Scarborough, who is also her fiance, has not let her.

"I’ve always said things too early, but I’ve never been wrong," she said.

On Wednesday, Brzezinski defended Scarborough following Trump's tweets, and doubled down on her defense Thursday morning.

"The chief law enforcement officer of the United States of America advanced a false conspiracy theory to intimidate the press and cause a chilling effect on the First Amendment," she said.

"Joe and I are not intimidated, and his bizarre behavior contravenes both the Constitution and basic moral judgment," Brzezinski added. "That is all we're going to say on the matter. We are continuing to focus on more pressing issues like the nuclear conflict with North Korea."

Meanwhile, London economist Brian Klaas, a fellow in comparative politics at the London School of Economics, who was also on the panel, said he's concerned that Trump's actions, especially in connection with his tweets and comments on North Korea, could start a war.

"There is a huge scope for miscalculation," Klaas said. ""We have two unstable people who are reckless, have nuclear weapons, and who are very prone to being defensive when it comes to their egos being at play.​ The invasion of Kuwait started because of a misinterpretation of signals."

The show's panel also was concerned about statements made by UN Ambassador Nikki Haley said on Wednesday, when she commented that if China does not cut off oil to North Korea, the United States would take the oil matter into its own hands.

"That suggests to me the potential now has been introduced of unilateral American military enforcement of sanctions against North Korea," Richard Haass, president of the Council on Foreign Relations, said.