From CNN:

(CNN) — Voters will determine if America is ready for a
black president come November, but Hollywood, often ahead of the
national curve, made up its mind about the issue ages ago.
On television and in film, black actors as acclaimed as James Earl
Jones and as obscure as Tommy Lister have played commanders-in-chief.

http://www.cnn.com/2008/SHOWBIZ/TV/06/05/black.presidents/index.html [1]