When President Bush arrives in Irvine on Monday morning to pitch his immigration reform plan, one of his party's best-known local standard-bearers will be maintaining a respectful — and politically careful — distance. Dana Rohrabacher, the nine-term Republican congressman from Huntington Beach, generally supports the president, but disagrees with his immigration policies. So Rohrabacher plans to sit out Bush's speech to the Orange County Business Council. "I don't want to be behind him looking glum and not applauding," Rohrabacher said. "So as not to be rude to the president — which I think is inexcusable — I think I'll just...