Obama's aides have said Romney's campaign is built on a "tripod of lies." Romney's complaints that the President tends to "say things that aren't true" have been noted. But who lies more? A look some of the biggest lies spun by both campaigns:

Romney: Claimed Obama eliminated work requirements for welfare.

Obama: Ran an ad asserting Romney backed a bill outlawing all abortions, even those in cases of rape and incest. Read More