are less than four weeks away. wherever you live, you're going to be bombarded soon enough, and you're going to be seeing a lot of ads sponsored by so-called super pacs. they are political action committees on steroids made possible by a recent supreme court decision. they're able to collect unlimited funds and keep their donors secret. and one of their ads-- this one for mitt romney-- will start airing in iowa tomorrow. --tonight. we asked wyatt andrews to tell us what the super pacs are doing to change the campaigns. >> mitt romney turned around dozens of american companies. >> reporter: you might think this t.v. ad came straight from the mitt romney campaign, but it didn't. it came from "restore our future," the super pac supporting mitt romney. >> restore our future inc. is responsible. >> reporter: this ad for rick perry, same story. it's not from his campaign but from "make us great again." the super pac supporting perry.