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Dozens of televisions display a political advertisement with the image of former Speaker of the House Newt Gingrich. Super PACs have spent millions on television ads attacking Mitt Romney ahead of the South Carolina primary.

Saturday marks the two year anniversary of the Supreme Court decision that spawned the so called "super PACs." Super PACs have played a huge role in the presidential primary so far. Critics, include the candidates themselves, complaining about the disclosure rules. And some politicians are pushing for reform. They need look no farther than California. Rick Hasen, professor at UC Irvine School of Law, explains.

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Rick Hasen has an upcoming book with Yale University Press titled, "The Voting Wars: From Florida 2000 to the Next Election Meltdown."