million checks. you got the super pac's that are just going crazy. >>reporter: the president, again, talking about republican have pac's. in this case it is a democratic super pac that put this ad together. while chicago insists there is no coordinate, we note that the have pac is run by bill burton a former white house aide, and the president himself, back in february, blessed this super pac and told his supporters that they could donate money to it because he was originally against the have pac's. so, david axelrod and others, top aides and advisors, have actually raised money for this super pac. >>stuart: have ads like this, backfired in the past? we go to our presidential historian. jane, welcome to the program. i can see how an ad would backfire if, (a), the candidate is defeated because of it