Was it just a coincidence that Vice President Harris showed up, 15 minutes late, to be interviewed by Fox News’ Bret Baier a day before Nate Silver’s poll aggregation website showed her chances of winning the election slipping below 50 percent? Probably not. What may link Ms. Harris’ slide in the polls and her tardy appearance for an interview in which she served up word salads to Mr. Baier’s questions on immigration and inflation and then segued, sometimes awkwardly, to denunciations of former President Trump? October hasn’t been a good month...