Jimmy Carter - Shoots Dems in the Foot, As Well as Himself; What a Fool
The way I heard it was that Phyrrus said "Another victory like that and we're done for." The OED (under "Pyrrhic") says it was the battle of Asculum in Apulia and quotes Phyrrus as saying "One more such victory and we are lost." (link to source)
Trust me, as a left-wing Democrat, having Jimmy Carter's support is poison. To paraphrase Pyrrhus, "any more support from the likes of Jimmy Carter and we're done for." Carter's now put his foot in his and my fellow Democrats' mouth big time (link):
"I think an overwhelming portion of the intensely demonstrated animosity toward President Barack Obama is based on the fact that he is a black man,"
The linked article continued:
Republicans called Carter's remarks "very destructive" (Newt Gingrich) or "an outrage" (GOP chairman Michael Steele, who happens to be black himself). But otherwise party leaders stifled themselves, apparently on the principle that you don't get in the way of an opponent when he's shooting himself in the foot.
I've always considered Obama to be Carter's second coming.