They say that a man who represents himself has a fool for a client. So, perhaps, does a person who represents Donald Trump. To most people, attacking someone with influence over one’s freedom and fortunes is self-evidently unwise, but that is precisely what Trump has been up to. This week, the former president attended a civil trial in Manhattan to determine what damages he might have to pay in a case about his company committing a massive, yearslong fraud. Justice Arthur Engoron, the judge in the case, has already ruled that fraud did occur, and Trump is furious about it. “This is a judge that should be disbarred,” he said outside of the court on Monday. “This is a judge that should be out of office. This is a judge that some people say could be charged criminally for what he’s doing. He’s interfering with an election.” David A. Graham: A guide to the cases against Trump The next day, Trump’s campaign issued a lengthy statement portraying Engoron as a Democratic operative, and Trump attacked …