And ultimately, I think the media will do the job of excoriating Romney for lying for Obama. That's the funny thing about telling lots of lies, you'll piss people off and they'll start calling you out on it. Has anyone focused on the false claims Obama made? There had to be some.
I doubt any of it matters though. I think the news cycles so fast these things play almost no factor in the way people actually vote when they are at the poll. Romney is an untrustworthy liar and shill for big business and the far right, or Obama is an untrustworthy socialist and redistributionist who wants government to own and control everything. That's what a lot of people will take with them to the polls.