Currently Barack Obama [ D-IL ] is the only serving African American in the senate.
None. However there have been plenty of brown players, some of which are African American.
Out of 974 total player in the NHL there are 216 American born players currently playing in the NHL.
Click on the 'Black Quarterbacks - 2007' link on this page to see African American quarterbacks that are on rosters.
they have 10 players currently in nba
According to an article on ESPN, 69 out of the 750 players on 2007 opening day rosters were African American. Click on the 'African American Major Leaguers' link below to see that article.
There have only been 4 African Americans in NHL