Shift to Obama

There has been a recent noticeable shift in sentiment among African American voters, who little more than a month ago heavily supported Sen. Hillary Rodham Clinton but now favor the candidacy of Sen. Barack Obama.

Clinton continues to lead Obama and other rivals in the Democratic contest, according to the latest Washington Post-ABC News poll. But her once-sizable margin over the freshman senator from Illinois was sliced in half during the past month largely because of Obama's growing support among black voters.

The question is now whether others who have typically supported either Clinton will also shift their support...