Oprah didn't want her link to Wright interrupting her money stream from crackers , or her caring front tarnished. Zero, not as smart as Oprah.
Oprah had Michelle and Barack on her show early on and endorsed him for President. Oprah is all about race, first, last and foremost.
Maybe just more determined, like a good Leninist.
There's another piece to the story ..... the fact that there aren't more churches like Wright's (as Obama hoped there would be), and that even in Wright's church, some congregants had serious problems with Wright's message.