As the 45th president of the United States, Donald Trump isn’t used to being reminded that he’s now a criminal defendant. He got one stark reminder from Judge Juan Merchan on Friday, according to a new report. The Daily Beast’s Jose Pagliery reported that during Friday’s jury selection, Merchan had to tell Trump to sit down after he abruptly stood up before the judge finished his sentence. Merchan had just gotten through more than an hour of back-and-forth arguments with both the prosecution and the defense about a contempt hearing scheduled for next week, where Manhattan District Attorney Alv…