well, I think it's more complicated than that;
true, D.C. has had an unacceptable non-voting status federally, whether the majority has been white or black, for 2 centuries since its founding in 1800but now, D.C. is trending white again -- likely to be majority non-black in a decade, say demographers, following recent gentrification trends:
http://www.washingtonpost.com/wp-dyn/content/article/2007/05/16/AR2007051602840.html
will better-connected yuppie whites correct the political imbalance? stay tuned.
in any case, this is just one of several big US cities that is likely to swing back from black to white, or at least mixed-ethnic, majorities in the next few years;
others include Atlanta, and maybe Oakland (the smallish black population is also in steep decline in yuppie San Francisco)
expensive housing means changing demography
[ 21 September 2007: Message edited by: Geneva ]