Some, such as Tucker Carlson, have asked for recent examples of the GOP appealing to racists. Well, how about the 2000 South Carolina primary? Ron Suskind dealt with this in his recent Esquire piece:

As for the Waterloo of South Carolina, most of the facts are well-known, and among this group of Republicans, what happened has taken on the air of an unsolved crime, a cold case, with Karl Rove being the prime suspect. Bush loyalists, maybe working for the campaign, maybe just representing its interests, claimed in parking-lot handouts and telephone "push polls" and whisper campaigns that McCain’s wife, Cindy, was a drug addict, that McCain might be mentally unstable from his captivity in Vietnam, and that the senator had fathered a black child with a prostitute. Callers push-polled members of a South Carolina right-to-life organization and other groups, asking if the black baby might influence their vote. Now here’s the twist, the part that drives McCain admirers insane to this very day: That last rumor took seed because the McCains had done an especially admirable thing. Years back they’d adopted a baby from a Mother Teresa orphanage in Bangladesh. Bridget, now eleven years old, waved along with the rest of the McCain brood from stages across the state, a dark-skinned child inadvertently providing a photo op for slander. The attacks were of a level and vitriol that even McCain, who was regularly beaten in captivity, could not ignore. He began to answer the slights, strayed off message about how he would lead the nation if he got the chance, and lost the war for South Carolina. Bush emerged from the showdown upright and victorious . . . and onward he marched.

No, Bush wouldn't countenance appeals to racism for political victory. He's just not that kind of guy. He just let's Karl Rove take care of it for him.