Polls consistently show that you can get double-digit percentages of Republicans to endorse Condi Rice for the 2008 GOP presidential nomination. However, she usually does worse than other Republicans in head-to-head matchups against Democrats. It's an interesting phenomenon, not so much for 2008 primary reasons (Condi's chances of getting the nomination would be very low even if she were running) but because it lets you analyze some Republicans' attitudes towards race, gender, and politics.
Suppose you -- like a number of white Republicans today -- think that racism and sexism pretty much ended in the 1960s. Any remaining racism and sexism holding back blacks and women, you think, are outweighed by the benefits of racial/gender solidarity within supposedly oppressed groups and the diversity-babble of white liberals. You'll probably end up thinking that a black female Republican would be the most electable candidate ever. You'll fantasize about how you could win the identity-politics obsessed black vote, and a lot of women, for the next couple decades, by having the first black and female president carry the GOP flag.