That statement implies that Republican primary voters are stupid, uninformed and gullible enough to believe the ads. obama is going to come at the Republican nominee with a lot more money and a lot more vicious attacks than Romney had. Heat - Kitchen, and all that.
Obviously the plurality of Republican voters are stupid, uninformed and gullible. Look at the presumptive nominee.
Of course this also holds for American voters in general. We have the government we deserve.