Mitt Romney and John McCain sparred over their tax and spending records and who was a better agent for change, in the second Republican debate in as many days as the clock wound down to the New Hampshire primary. "You have a choice," Romney, the former governor of Massachusetts, said Sunday after ticking off his accomplishments in office. "You can select somebody who wants to fight for those things, or you can select somebody who's actually done those things." McCain listed wasteful spending he has exposed, as well as an Air Force tanker contract he squashed, before responding: "I think it was a reason why I wasn't elected Miss Congeniality in the Senate. I have a record of saving billions of dollars."