It begins with a politically convenient flip-flop on gay marriage. But whatever. It's what politicians do. That said, I don't know really understand Harold Ford's run for Senate. I think people need to be really careful about assuming that, running in a primary against an incumbent in an off year, a dude who just moved to New York is going to benefit from a tsunami of African-American support.
Comparisons to Hillary Clinton are faulty. The party cleared the field for her run, and she was married to (pre-Obama) the most popular president, among African-Americans, perhaps since Lincoln. With due respect to Ford, a few stints on MSNBC can't really compare.