From an interview with Congressman Tim Johnson (R-IL):

CF: Whom are you supporting in the race for Republican presidential nomination?

TJ: I'm still looking at al the candidates. I'm a close personal friend of Ron Paul, and I have a huge amount of respect for him. Ron Paul is the most principled man—or woman—who has ever run for office in America in my political lifetime. He is committed to a set of principles; he doesn't deviate from those principles.  His personal ethics are of the highest nature. Nobody has asked me to endorse them yet.

CF: I think Ron Paul is a mystery to many Americans. What's he like? Do you go out to dinner with him and just talk?

TJ: Sure. He's interesting, funny, extraordinarily bright, engaging—a fine human being. He's a real workout fanatic. He's in terrific shape. He's the kind of guy who, if you tell him what you're interested in, he probably knows something about it. He's got an eclectic knowledge, and he's able to talk about anything from sports to medicine—and everything in between.