02/21/2012 10:21 am ET Updated Feb 21, 2012

2012 GOP Negative Campaign Ads Much More Frequent, Vicious Than In Primaries Past

If you thought you were living through a particularly nasty presidential primary season, turns out you were right.

Four years ago, just 6 percent of campaign advertising in the GOP primaries amounted to attacks on other Republicans; in this election, that figure has shot up to more than 50 percent, according to an analysis of advertising trends.

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