Barack Obama -- a leader some have dubbed the hip-hop president -- has yet to have a rapper perform in the East Room.

So what's taken President Obama so long to recognize the genre that mobilized to help get him elected?

In a crumbling music industry where survival often depends on playing nice, hip-hop is not afraid to push envelopes. And that's exactly why it's worth celebrating in America's house.

http://www.washingtonpost.com/wp-dyn/content/article/2010/04/23/AR2010042300046.html?hpid=topnews