The Arizona senator became agitated when asked about Romney having said he supports a self-deportation policy, whereby illegal immigrants would voluntarily go back to their country of origin and then apply for U.S. citizenship.

“No he hasn’t. He’s said that’s one of the options he’s looked at,” McCain said. “So don’t put words in his mouth.”

Romney has explicitly said he supports such a policy, however. During a Republican debate in January, Romney was asked how he would address illegal immigration.

“The answer is self-deportation, which is people decide they can do better by going home because they can’t find work here because they don’t have legal documentation to allow them to work here,” Romney said. “We’re not going to round them up.”