Biden, tieless in a blue blazer, followed his wife onto the platform and read his speech off a teleprompter, which seemed all wrong. This wasn’t the U.N. General Assembly, for heaven’s sake. The illusion of spontaneity was immediately scuttled, much in the way an actor who walks onstage holding a script diminishes his hold on our imaginations. The whole point of these intimate gatherings is to eliminate the filters between candidate and voter. This did not feel like Biden unleashed.