Los Angeles Times: A sizable majority of Americans said they did not believe that harsh political rhetoric was the reason a gunman opened fire over the weekend in Tucson, killing six and wounding 14, including Rep. Gabrielle Giffords, according to a CBS News poll released Tuesday. The finding comes as Republicans and Democrats have sparred over whether recent heated political rhetoric may have been a factor in the shootings. Giffords was among 20 lawmakers targeted in campaign literature by Sarah Palin, the conservative icon who may be considering a presidential run in 2012.