"CNN contributor David Gergen, who has advised Democratic and Republican presidential administrations, said Thursday that the negative tone of these rallies is "incendiary" and could lead to violence."

I hadn't read this yet when I remarked today that I had real concerns about some of the anti-Obama rhetoric intensifying in the last couple of days. I'm pleased to have read that McCain finally(!) asked supporters of his to be respectful -- only it's come far too late after the mantra "dangerous, dangerous, dangerous," and it lacks the endorsement of McCain's running mate.