Tom Coburn doesn’t care about the midterm elections. Sure, he’s a senator. Sure, he’s a Republican. And sure, that means his party lost control of both houses of Congress last fall and will be out of power until at least 2009. But what difference does that make to Coburn? “I don’t think it matters,” he said on a warm day in December, sitting in his office on the first floor of the Russell Senate building as the annual session came to a close. “It will be my first time in the minority party, but I’ve been in the minority the...