As dark as this picture is for congressional candidates, there’s bright news at the state level. Somehow, moderates are holding their own in governor’s races—and some of the party’s biggest rising stars are centrists in the statehouse ranks.If Sarah Palin and Jim DeMint are the patron saints of hard-right anti-establishment types, Mississippi Gov. Haley Barbour is their counterpart in the center. The wily head of the Republican Governors Association, a possible contender for president in 2012, preaches a big-tent philosophy that contrasts sharply with the ideological purification drive on the right.