The 2012 campaign will be dominated by wealthy corporations, unions and individuals who can anonymously spend as much as they want in favor of a candidate - thanks to how the Supreme Court decided the Citizens United case two years ago today. The decision gave birth to a new type of political action committee, the super PAC. Analysts [say the ruling] is enabling wealthy interests to be able to shape the political system like never before. The millions of dollars spent fueling this winter's bloodbath of attack ads in the Republican presidential primary is probably just a sneak preview of a stream of ham-fisted political advertising expected this year - all the way down to congressional races. Through organizations with names like Winning Our Future, wealthy interests can furtively fund the type of nasty TV ads that torpedoed then-surging Newt Gingrich before the Iowa caucuses and later carpet-bombed South Carolinians with commercials calling Mitt Romney a job-killing corporate raider" when he led the Bain Capital private equity firm. At the same time, presidential aspirants can claim that they had nothing to do with the attacks because the presidential campaigns can't legally communicate with the super PACs doing the dirty work. Still, the super PACs in favor of Gingrich and Romney are run by the candidates' former top associates, political pros familiar with their thinking and strategy.