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• 40 percent of tweets on Mr. Romney were negative, 19 percent positive, 41 percent neutral.

• 40 percent of tweets on Mr. Gingrich were negative, 21 percent positive, 38 percent neutral.

• 15 percent of tweets on Mr. Paul were negative, 55 percent positive, 30 percent neutral.

Source: Computer-assisted analysis of 21 million campaign-related tweets appearing online from May 2 to Nov. 27 by the Pew Research Center’s Project for Excellence in Journalism. See the complete study here:

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