Okay, so I'm not perfect. But I get results. That's the soft-selling pitch of Rudy Giuliani's first presidential TV ad, which will begin airing in New Hampshire Thursday, weeks after some of his Republican rivals hit Granite State airwaves. The 60-second spot dwells on Giuliani's pre-9/11 success in driving down crime and welfare rolls as mayor. But in a veiled nod to 9/11 - as well as, perhaps, his messy personal life - Giuliani argues he has faced countless trials and still gotten results. "I've been tested in a way in which the American people can look to me," Giuliani...