President Trump sabotaged himself yet again this week. He totally wasted about 95 percent of the generally favorable media coverage and bipartisan huzzahs he got for his Afghanistan policy speech on Monday night. He could have basked in the Afghan afterglow all week long and hit a few hundred balls on the practice range. But instead by Tuesday night he was in Phoenix and up to his old dumb tricks, bashing Arizona’s Republican senators John McCain and Jeff Flake, rehashing what he said about Charlottesville and throwing old and new spitballs at the fake media. It’s hopeless. He just can’t stop himself. He can’t let anything go. He can’t quit campaigning for the job he’s already won. And he can’t keep from bashing the Republicans in Congress he so desperately needs. It seems he’s doing everything he can to get his base to vote Republicans out of power in 2018. He wants to get rid of Flake.