Publicly, James Baker. Bush One should have dealt with that, he didn't. Even marginally, other than Duke, reviled by Republicans, and the House candidate from Tn in 04, also reviled, I don't think there are any in the last 20 years or so. The Republican Party does a far better job of reviling these bigots than the Dems, who look at them as votes. But no, they get no credit.
And David Duke wasn't running for Congress, but for the Louisiana state legislature.