>> i'm angry because prosecutors at the justice department don't know the difference between friendship and corruption. and have chosen to twist my duties as a senator, and my friendship, into something that is improper. they are dead wrong. and i am confident that they will be proven so. >> you prosecuted these kind of federal corruption cases. how common is that? how does it work? >> things are changing. it used to be a successful defense. then we saw it didn't work for governor mcdonald in virginia. you know he's on his way to prison. i think what jurors are starting to get is maybe this is how politics used to work back in the day. you scratch my back i scratch yours. it's a new day now. so there's a line that's crossed when it's not just that it's regular politics to do favors. if you're doing favors not because you want to help someone, but because they're giving you money, expensive gifts, rolex watches, for