 This is Morning Edition from NPR News. I'm Layla Faldin. And I'm Steve Inskeep. Good morning. For years now, President Biden and the people around him have made a virtue out of not reacting to events. They have dismissed social media criticism, not real life. They have dismissed allies they see as panicking. And over the weekend, amid calls for the president to drop out of his bid for re-election, Biden campaigned as scheduled in Pennsylvania.