dysfunctional brood mare

Mark Steyn in National Review Online discussing Howard Kurtz' WaPo article about McCain media manipulation:

But, if you were really savvy, you'd 'manipulate' the media into a stampede of lurid drivel deriding her as a Stepford wife and a dominatrix, comparing her to Islamic fundamentalists, Pontius Pilate and porn stars, and dismissing her as a dysfunctional brood mare who can't possibly be the biological mother of the kid she was too dumb to abort.

Yup, it's ridiculous. It's like the Clinton years again, with flipped politics.