Dick Cheney was already going down in history as one of the most influential vice presidents ever. Now he's taking flak for being one of the most vocal ex-VPs, too. Since leaving office, Cheney has gone from White House booster No. 2 to White House critic No. 1. Agree with him or not, however, he's hardly an outlier: There's nothing more American than ex-presidents and VPs slamming their successors.[more ...] Sponsored Topics: Dick Cheney - White House - United States - History - Barack Obama