Right wing started calling him that because he had sex with someone in the White House and and started continuing perpetuating the long held idea of the "savage" black, fighting and having sex with all the white women. See the movie: "Birth of a Nation". The NAACP might have created the term because they felt Clinton was actually responding to the needs of the poor (unlike the right wing powerhouse presidents before him)
Birth of a nation? Lol. get out of your fishbowl buddy.

oh and the naacp might care that he tried to help the black poor i doubt they really give a **** about poor white americans