Study: Twitter users tough on Republicans, Obama Associated Press Copyright 2011 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Updated 07:50 a.m., Thursday, December 8, 2011 NEW YORK (AP) — The 2012 presidential contenders have had a rough go of it on Twitter, according to an analysis of the political conversation taking place on the popular social network. [...] a majority of the candidates, including President Barack Obama, have received more negative than positive coverage on Twitter than in regular news coverage or blogs. —Tweets about three Republican candidates — Mitt Romney, Rick Perry and Herman Cain, who suspended his campaign last Saturday — grew increasingly negative since October, the study found. —The study found the language used on Twitter to be "very personal and pungent and even profane ...