WATCH: Watergate prosecutor explains how Trump’s ‘isolation’ is similar to final days of Nixon presidency

President Donald Trump's increasing isolation is reminiscent of the period preceding President Richard Nixon's 1974 resignation, former Watergate prosecutor Nick Ackerman explained on MSNBC's "All In" with Chris Hayes.

Hayes read a tweet from President Donald Trump that was sent on Christmas Eve.

"I am all alone (poor me) in the White House waiting for the Democrats to come back and make a deal on desperately needed Border Security," Trump tweeted.

"The president is sort of alone stewing in this kind of empty White House," Hayes reported. "When you read the inside accounts, as Nixon's presidency is going down the tubes and the sort of alienation, increasing isolation -- he also was drinking a lot, which this president doesn't do -- there was a kind of, I felt a sort of profound resonance."

"They're very much the same," Ackerman replied. "Nixon really kept to himself. He wound up sitting in front of the fire and kind of ruminating -- to the point where his Secretary of Defense was so concerned that there was an alert to go out to not take any of Nixon's orders if he were to ask them to basically release any of the ICBMs, the missiles against Russia."

"This an actual thing that happened," Hayes noted.

Ackerman suggested Trump's bunker mentality stems from his increasing legal jeopardy.

"He's got three cooperating witnesses, three people who are very close to him," he explained. "Michael Flynn, his former security adviser, [Rick] Gates who was the deputy to [Paul] Manafort and was running the campaign after Manafort left, and then you've also got Michael Cohen, his personal lawyer."

"I don't think we ever had any witnesses in Watergate that were that close to Nixon," Ackerman said.

"I mean, John Dean -- who was the lawyer in the White House -- didn't really have the closeness to Nixon that any of these three people have," he added.

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