President Biden said Friday that he had stayed up until at least 2 a.m. watching Fox News analysis of his State of the Union speech to Congress — before saying he was disappointed seeing vulgar protest signs and children making obscene gestures at him when he travels. “I was watching on television last night, about two in the morning, after we got back to the house,” Biden said at a Philadelphia-area campaign rally, his first public address since his annual congressional appearance. “I had the TV on and there was a Fox News commentator saying, ‘You know, Biden is changing...