The federal government’s classified documents indictment was once considered a “slam dunk.” But this month, Trump-appointed Judge Aileen Cannon of the Southern District of Florida dismissed the case, ruling that the attorney general improperly appointed Jack Smith, and therefore Smith could not legally prosecute Trump. Smith promptly notified Cannon that he intends to appeal her decision, but it’s not clear what his strategy will be. There is now a near-zero chance that Donald Trump will be tried over this case in front of a jury before November—but special counsel Jack Smith is forging ahead with an appeal that could go...