You'll find that in groups like The Roots, A Tribe Called Quest, like you said before, Talib Kweli.

NPR: Getting 'The Message' from Hip-Hop Lyrics

Rappers Common and Talib Kweli have voiced their support for Barack Obama.

FORBES: Endorsement Rap

"Get By" by Talib Kweli - I hope I'm pronouncing that correctly...

NPR: Getting 'The Message' from Hip-Hop Lyrics

That Common is, along with Talib Kweli, one of the most socially responsible rappers in the industry is worth noting, but not my particular point.

FORBES: Controversy Management: A Brief Lesson From The Rapper Common

From then on, Solomon received a steady stream of attention from hip-hop heavyweights, collaborating on songs with the likes of DMC (of Run-DMC), Cassidy and Talib Kweli (he also appeared as an honorable mention on our Best Jewish Rappers list, released last Hanukkah).

FORBES: Iron Solomon And The Business Of Battle Rap

Ms. TONI BLACKMAN (Musician): I think my music is really in the vein of a Lauryn Hill, of a Mos Def, of a Talib Kweli, of the Roots, of artists who are part of hip-hop culture and really committed not only to being on stage and being in the limelight but really committed to the art form and to the tradition of the oral tradition.

NPR: Hip Hop Takes on Diplomatic Role with State Department