MSNBC host details Trump's 'prolonged public meltdown' as observers warn he's in a 'state of cognitive decline'

MSNBC's John Heilemann, filling in Monday for host Nicolle Wallace on "Deadline: White House," described President Donald Trump's disturbing tweet tirade over the weekend at the beginning of the show and speculated about its possible causes.

Heileman noted that Trump's online outbursts coincided with speculation increasing that Special Counsel Robert Mueller's investigation will be coming to some sort of a conclusion in the near future — a conclusion which, if damning enough for the president, could lead to impeachment.

"So it's against that rather grim backdrop that President Trump appears to be having some kind of prolonged public meltdown on Twitter," Heileman said. "One so seemingly random and so incendiary that it is raising questions about his mental competence and fitness for office — not for the first time — as well as speculation that Trump is suffering some kind of panic attack related to that Mueller report that we were just talking about. What is apparent, however,  regardless of whether Trump is freaking out for good reason or simply losing it — or both — is that his nearly 72 hour-long airing of grievances seemed designed to stoke outrage around some of the most divisive themes of his presidency."

He added: "Among the attempts to explain this offensive, days-long Twitter tirade: George Conway, noted conservative legal voice and husband of Kellyanne Conway, suggesting that Trump is in a state of cognitive decline."

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