"Are you not entertained?" That was Jon Stewart’s response to Rick Perry’s brain freeze. He said it twice, maniacally. “Are you not entertained?” Stewart’s right about what’s happening. America is on track for the most amusing apocalypse ever. Things may be going to hell, but the campaign narrative unfolding in real time couldn’t be any more fun. It’s all entertainment, just grist for the media mill, and apparently there’s no bummer bad enough to shock us back to our senses.