Smear campaign –

Campaign Media Analysis Group (CMAG):

The two super PACs supporting the top candidates were more divergent in their ad strategies.

Restore our Future, supporting Romney, ran 4,969 spots, all of which were negative.

The Gingrich-backing Winning our Future ran 1,893 spots, and only 53% were negative.

Of the 1,012 spots Newt Gingrich’s campaign ran, 95% were negative.

Mitt Romney’s campaign ran 3,276 ads and 99% were negative.