A handy, brief synopsis of the US Supreme Court's 08-09 session that places the nine Justices on a political spectrum with Clarence Thomas as the most conservative on the bench makes me wonder whether or not black Republicans are cognitively a cut above the mass of their Democratic co-racialists.
The only black Republicans I've met who have made known their party membership to me are a handful of pious Baptists and a tree trunk of a man who played Rudy Giuliani in a mock primary debate in front of a local conservative booster organization back in January of '08 (I was Ron Paul). Yet I am hardly able to name three or four--let alone the 15 or so needed for proportionate representation--major black media figures on the political left for every one on the right. Thomas Sowell, Shelby Steele, Armstrong Williams, Condoleeza Rice, JC Watts, Walter Williams, Michael Steele, Alan Keyes, just off the top of my head. Good luck naming 100 prominent black Democrats to match!
Does the the larger US black population exhibit the a similar skew toward Republicans? No, not according to the GSS. Converting Wordsum results into IQ scores with a standard deviation of 15 and on the presumption that the white mean is equivalent to a 100 yields 87.8 for black Republicans and 92.5 for black Democrats.
As Michael Steele's selection as head of the RNC and the choice of Bobby Jindal to deliver the GOP's first major televised rebuttal to the Obama administration lead many to suspect, being non-white does not appear to hinder political and punditry aspirants of a conservative bent. The GOP is a white party not because it intentionally screens out non-whites, but because most NAMs do not stand to benefit from the things it putatively stands for.
GSS variables used: RACECEN1(2), PARTYID(0-2)(4-6), WORDSUM, YEAR(2000-2008)