A Pointed McCain-Romney Exchange

Finally, a back and forth between a few of the frontrunners.

Romney used a question about illegal immigration to take a shot at McCain's bipartisan work on the issue as well as the Arizona senator's pet issue -- campaign finance reform. Applause followed.

In McCain's rebuttal, he came out swinging. He noted he had been a consistent supporter of campaign finance reform before dropping the hammer: "I have not changed my position in even numbered years or based on the offices I have been running for."

WOW.

Meanwhile, Duncan Hunter offered a clinical description of the administration's handling of illegal immigrants: "This administration has a case of the slows on border enforcement."