Donald Trump's former lawyer Michael Cohen said Friday he believes his former boss will "do anything and everything" to win re-election and "even go so far as to start a war" to remain in office.

In an exclusive interview with NBC News' Lester Holt, Cohen was asked if he thought Trump would win in November.

"So Donald Trump will do anything and everything within which to win. And I believe that includes manipulating the ballots," Cohen said.

"I believe that he would even go so far as to start a war in order to prevent himself from being removed from office," Cohen continued. "My biggest fear is that there will not be a peaceful transition of power in 2020."