Olbermann on violence in American politics

I have actually grown less convinced by MSNBC's vociferous Keith Olbermann over the course of the campaign, but his recent "special comment" is worth watching. Olbermann has spoken persuasively in the past about the proximity of violence to politics in America, attacking Hillary Clinton for invoking the assassination of Bobby Kennedy. He hits out now at McCain and Palin for failing to own up to their complicity in allowing the tenor of their rallies to reach a bloodthirsty fever pitch. Video below.