Rep. Ron Paul, a Texas Republican running for president, has something that his rivals in the Iowa caucus don't have: a positive image on social media. While Paul gets less mainstream media coverage than nearly any other candidate, he gets far more positive mentions on Twitter and blogs than any of his GOP rivals, according to a new survey from the Pew Research Center's Project for Excellence in Journalism. That's saying something, as the study found that political commentary on the microblogging service, based in San Francisco, is harsher and generally more negative than on other media platforms. Along with Barack Obama, Paul had one of the strongest online presences during the last presidential campaign. But little of that translated into votes during Paul's campaign four years ago. One reason for Paul's positive social media profile may be that he gets so little mainstream media coverage, said Mark Jurkowitz, associate director of the Project for Excellence in Journalism. Only former Pennsylvania Sen. Rick Santorum receives less traditional media coverage. "The mainstream media doesn't deem them to [be] viable candidates, so they don't get as intense [a] vetting process as the others," Jurkowitz said.