It's not that I think our peculiar duopoly ("a single party with two right wings" was originally Gore Vidal's formulation, I believe) is a praiseworthy system, although until recent decades it did a serviceable job of locking the lunatic fringe out of the action, but you conduct your opposition with the party you have, not the party you want, and given the monstrous, cruel and uncouth thing that walks the land in the muddy raiments of the old GOP, the moral equivalence Sheehan here advances is pernicious.