Michael Cohen could make or break Trump's criminal trial

The prosecution's star witness in Donald Trump's Manhattan criminal trial could also be its biggest liability.

Michael Cohen, Mr Trump's former personal attorney, is expected to take the stand to testify against the man he once reverently referred to as "The Boss."

Cohen made the hush money payment at the centre of the case, a sum which the prosecution alleges was fraudulently reimbursed by Mr Trump. He could provide essential testimony for prosecutors.

But outside the courtroom, on podcasts, television and social media, Cohen has not exactly helped their case.