DELRAY BEACH, Fla. — The last time Bill Clinton and Barack Obama spent so many hours on the campaign trail, dashing across the country to appear before adoring crowds, they were on different sides of the Democratic argument. -snip “But I want to tell you something,” he continued, waiting for the crowd to listen. “It is my professional opinion that he has done a much better job than he has gotten credit for so far. And all elections are about the future, so what is the alternative?” -snip- “If you’re a Democrat, you need to hold your head up,” Mr....