Arizona Sen. John McCain has been down this road before, so he’s giving GOP presidential hopeful Mitt Romney some pointers—and encouragement. On NBC’s Meet the Press Sunday, McCain said that Romney is “improving dramatically as a candidate,” noting that some states’ nomination process of awarding delegates proportionally probably hurt Romney’s ability to deliver a knockout blow early on. “He’s working on doing a better job,” said McCain. “He’s got to focus more on the economy.” McCain also said this was “the nastiest fight I’ve ever seen,” referring to the GOP race. “It’s gone on too long, and its gotten way, way too personal.” No word on whether he will be giving any advice on picking a running mate.