“This is how republics collapse.” Those ominous words captured the hand-wringing, hair-pulling reaction to the dismissal of the Florida case against Donald Trump by Judge Aileen Cannon. It was not just that she reached a conclusion long supported by some conservative lawyers and a Supreme Court justice. To rule in favor of Trump in such a dismissal is, once again, the end to Democracy as we know it. The 93-page order methodically goes through the governing cases and statutes for the appointment of prosecutors. There has long been a debate over how an attorney general like Merrick Garland can circumvent...