There's a racist in the White House now, as is his wife. I am not saying that makes it acceptable for anyone else in the future to be the same. I'm just saying that it wasn't enough to keep the present president from being elected so clearly a goodly number of American's don't consider it a deal breaker when it comes to picking a candidate to support.
http://www.youtube.com/watch?v=gI9F_xmzv8Q
http://www.youtube.com/watch?v=e5INFAuM1xI
It is OK when blacks are racists though.