If Donald Trump can’t help himself and continues chastising anybody from witnesses, court staff, or even jurors in his hush money trial, he will be headed to jail for contempt, an expert warned Tuesday night. Former federal prosecutor and law professor Ryan Goodman sees drastic measures being employed should the former president fail to respect the New York judge’s gag order, put in place earlier in the day. “Now we have a gag order that says, ‘If he goes after those witnesses, et cetera, there could be consequences and, at a certain point, he could be held in contempt, and that could mean jai…