This is a generally solid ad with one major flaw. The opening line "Barack Obama knows a lot about housing problems" and the closing line "that's a housing problem" are complete inside baseball. No one who hasn't been paying neurotically close attention this race (ok, like me and probably everyone reading this blog) knows what the heck the spot means by this. It's a comeback to the Obama ad that just went up on rotation, sure, but that's way too obscure for a normal person who's isn't a political junkie.
Those two lines may not seem like much to pick on, but they make up 1/3rd of the ad's total run time (not counting the disclaimer). That's a lot of air to waste. Just stick with the corruption message next time guys.