His habit of saying that he is “in trouble” when he screws things up in public raises an awkward question: who's pulling his strings? The speech President Biden gave to a couple hundred solons acting as a “joint session of Congress” apparently sapped his energy enough to cause some embarrassing moments for the man playing the part of Leader of the Free World… for the next two days. Commemorating the fiftieth anniversary of Amtrak yesterday, he lapsed into an incoherent word salad, unable to complete a sentence or stay on the same topic. A jumble of thoughts, none of the...