Michael Cohen warns would do 'anything and everything' to remain in ...

Donald 's former attorney Michael Cohen has claimed that the president will do 'anything and everything' to win - even starting a war if necessary to keep him in the White House.

Cohen, who is promoting his forthcoming book, spoke to NBC's Lester Holt for an interview due to air on Tuesday.

He echoed mounting concern about the tactics the president could use to contest the November result. 

'Donald will do anything and everything within which to win,' said Cohen, who remains under house arrest in New York.  

Michael Cohen spoke to NBC's Lester Holt for an interview to be aired on Tuesday

Michael Cohen spoke to NBC's Lester Holt for an interview to be aired on Tuesday

Cohen said that he is deeply troubled about what could possibly happen in November

Cohen said that he is deeply troubled about what could possibly happen in November

'I believe that includes manipulating the ballots, I believe that he would even go so far as to start a war in order to prevent himself from being removed from office. 

'My biggest fear is that there will not be a peaceful transition of power in 2020.'   

himself has stated several times that he might not accept the result.

'I have to see,' he told Fox News on July 19.

'No, I'm not going to just say yes. I'm not going to say no, and I didn't last time either.'

has urged 's rival, Joe Biden, not to concede on election night if the vote is close. 

Cohen was sentenced to three years in prison for campaign-finance crimes tied to his work for and will serve the rest of his term confined to his home. He’s due to be released in November 2021. 

His new book, Disloyal, is out on September 8.

Cohen, who worked for from 2006-18, was once one of 's most ardent supporters, even vowing he would 'take a bullet' for his boss.

He has since turned against him, and become one of his most vehement critics. 

Michael Cohen worked for Donald Trump from 2006 until 2018 and was deeply loyal

Michael Cohen worked for Donald from 2006 until 2018 and was deeply loyal

Cohen, second left, is pictured with Trump in 2011 - he was frequently by his boss's side

Cohen, second left, is pictured with in 2011 - he was frequently by his boss's side

In the peek at his memoir, Cohen revealed the 'mob boss' mentality of the president in his foreword, which he titled 'THE REAL REAL DONALD .'

'Apart from his wife and children, I knew better than anyone else did,' Cohen wrote, claiming he was the one who pushed him to run for president in 2011 and 2015.

Cohen previewed the cover of his upcoming book 'Disloyal' on Twitter Thursday morning

Cohen previewed the cover of his upcoming book 'Disloyal' on Twitter Thursday morning

'In some ways, I knew him better than even his family did because I bore witness to the real man, in strip clubs, shady business meetings, and in the unguarded moments when he revealed who he really was: a cheat, a liar, a fraud, a bully, a racist, a predator, a con man,' he revealed.

But he also refers to as someone he knew intimately well. 

He recalls driving south from New York to testify against the 'real real Donald ' in 2019.

'Not the billionaire celebrity savior of the country or lying lunatic, not the tabloid tycoon or self-anointed Chosen One, not the avatar @realdonaldtrump of Twitter fame, but the real

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