His name has never appeared on a ballot — only a movie marquee — but already, people are whispering about President Arnold Schwarzenegger. Oh, no, you're saying — that can't be. For starters, he hasn't even run for California governor yet. First things first. And then there's the little matter of the Constitution, which prohibits any but native-born Americans from being president or vice president. Not to worry — or do worry, depending on your politics. Utah Sen. Orrin Hatch has introduced a constitutional amendment to allow the foreign-born who have been naturalized citizens for at least 20 years to...