Larry David was spotted, enthusiasm in tow, at a Barack Obama campaign rally this morning, nervously pacing, chewing gum, and watching the senator from the back of the Dartmouth College's Alumni Gymnasium. The Curb Your Enthusiasm star, who arrived in New Hampshire Monday, plans to spend the day pitching Obama to the university's students and manning phones for the front-runner. "Then they can hang up on me the way I hang up on them when they call me," David said. In the middle of the speech, a woman near the stage passed out and was rolled away in a gurney. David couldn't resist: "Sinatra had the same effect on people."