One of the possible strategies I’ve read for a tough case like this is to antagonize the judge and hope they make an error, then have it declared a mistrial.
This is likely precisely why the judge has been so lenient. He knows the weight of this case and knows that any mistake he makes is going to be used to attempt to overturn the trial, so he’s being extra careful to demonstrate that he’s done the trial without bias.
But trumps attorneys also know this, so letting him be a complete ass might be the best shot they have.