"This is where you see the civil war!" burbled Chris Matthews, experiencing near-asphyxiatory pleasure on an outdoor stage in the sweltering Denver heat, while behind him two competing groups, Obama supporters and the PUMA (Party Unity My Ass) backers of Hillary Clinton, chanted "Obama! Obama!" and "Hillary! Hillary!" at each other. Matthews looked as though he might wet himself as a camera panned the crowd, and he declared, "We're at ground zero!"