There’s some debate going on in conservative circles about whether Biden will show up at the debate and, if he does, whether he’ll be an incoherent mess or unexpectedly competent. The debate will continue thanks to Biden’s Saturday performance. The news yielded two epic Slow Joe moments, a Hitler insult, and a lie. Joe, however, is assuring anyone who will listen that he’ll do fine at the debate because Trump is “not that smart.” Whatever they’re pumping into Joe, it must be good stuff. No matter how carefully Biden’s handlers are keeping him cocooned, and how foreshortened his days (with...