"There are some things where Governor Romney is different from George Bush. You know, George Bush didn't propose turning Medicare into a voucher. George Bush embraced comprehensive immigration reform. He didn't call for self-deportation. George Bush never suggested that we eliminate funding for . So there are differences between Governor Romney and George Bush, but they're not on economic policy. In some ways he's gone to a more extreme place when it comes to social policy. I think that's a mistake."