National Review has a balanced piece here. Pretty clearly it was a dumb thing to do.
Eric Cantor has made his bed; now let him sleep in it.
Update: The Weekly Standard reports that in the closing days of the election Lugar ran an attack against Mourdock for, of all things, supporting the Ryan Budget plan. You know the budget plan put forth by Paul Ryan, one of the founders of the Young Guns! Young Guns PAC really can pick 'em!