Black lawmakers rethink Clinton support.

From Newsweek:

In a fresh sign of trouble for Hillary Rodham Clinton, one of the former first lady's congressional black supporters intends to vote for Barack Obama at the Democratic National Convention, and a second, more prominent lawmaker is openly discussing a possible switch.

Rep. David Scott's defection and Rep. John Lewis' remarks highlight one of the challenges confronting Clinton in a campaign that pits a black man against a woman for a nomination that historically has been the exclusive property of white men.

UPDATE on Rep. Lewis: See The New York Times.