This week, it was Donald Trump’s former fixer Michael Cohen’s turn to take the stand in the hush-money trial in New York. Cohen walked the jury through the steps he says he took to make any potential story that would damage Trump’s image go away, in advance of the 2016 election. The defence is trying to chip away at Cohen’s credibility, to sow seeds of doubt among the jury listening to his testimony. So how did he do? Jonathan Freedland asks former federal prosecutor Ankush Khardori what he makes of the prosecution’s star witness so far