Next up, freshman rules. last night on "letterman," rand paul shared some advice he's gotten as a new senator. let's watch. >> you know, when i was first elected, john mccain said, he said, the first six months that you're here, you'll pinch yourselves and say, how did i get here. and then the next six months, you'll pinch yourself and say, how the hell did the rest of these guys get here. >> i found out that you and i have a friend in common. do you know who i'm talking about? >> no. >> senator al franken from minnesota. >> yeah, he's my mentor. >> now, explain that process. >> well, i'm not ...