Ann Coulter is under fire from a fellow conservative on Tuesday after calling President Obama a "retard." On Monday night during the final presidential debate, Coulter used the long-considered derogatory term for mentally handicapped individuals. She tweeted that she thought Mitt Romney was handling the debate well, apparently by not engaging Obama too aggressively. "What a stupid, shallow thing to say, Ann," fellow conservative pundit Michelle Malkin tweeted in response early on Tuesday. "She sure doesn’t speak for us," the staff of Malkin's social media site Twitchy wrote in an article headlined "Groan: Ann Coulter calls President Obama a 'retard.'...