Should Mueller subpoena him, as he has threatened to do, Trump should ignore the subpoena, and frame it for viewing in Trump Tower.

If Mueller goes to the Supreme Court and wins an order for Trump to comply and testify to a grand jury, Trump should defy the court.

The only institution that is empowered to prosecute a president is Congress. If charges against Trump are to be brought, this is the arena, this is the forum, where the battle should be fought and the fate and future of the Trump presidency decided.

The goal of Mueller's prosecutors is to take down Trump on the cheap. If they can get him behind closed doors and make him respond in detail to questions — to which they already know the answers — any misstep by Trump could be converted into a perjury charge.