It’s a long and ignominious list. First there was Newt Gingrich. Then came Larry Craig, Mark Foley, David Vitter, Chip Pickering and Vito Fossella. Now starring John Ensign and Mark Sanford.

Politically, sex scandals are equal-opportunity destroyers. For every David Vitter, there is an Eliot Spitzer. For every John Ensign there’s a John Edwards. For every Bill Clinton there’s … well, there’s only one Slick Willie. But you get the point: Sexual scandal knows no party.