When asked about education reform and the "No Child Left Behind" act, Rick Santorum admitted that he voted for the Bush legislation even though he didn't agree with it.

"I supported it. It was the principal priority of President Bush....I have to admit, I voted for that. It was against the principles I believed in. But, you know, when you're part of the team, sometimes you take one for the team for the leader, and I made a mistake. You know, politics is a team sport, folks. Sometimes you've got to rally together and do something."

Santorum said that today he believes that the federal government doesn't have a role in federal education.

"What was a bad idea was putting all the money out there and that in fact was a huge problem," Santorum said. "I admit the mistake and I will not make that mistake again."

Mitt Romney quickly took notes during Santorum's answer, but didn't bring it up when it was his turn to speak. It was an easy opportunity for any of the candidates to paint Santorum as an establishment Republican and a Washington insider.