Mitt Romney has an ad out today that goes after Newt Gingrich for something the former speaker of the House said . . . in May:

In May, on Meet the Press, Gingrich criticized Paul Ryan’s plan to reform Medicare. “I don’t think right-wing social engineering is any more desirable than left-wing social engineering,” Gingrich said to host David Gregory. “I don’t think imposing radical change from the right or the left is a very good way for a free society to operate. I think we need a national conversation to get to a better Medicare system with more choices for seniors.”