The story

Democratic Sen. Sherrod Brown of Ohio is one of the undecided superdelegates being courted persistently by the campaigns of Sens. Hillary Clinton and Barack Obama.

With the race for the Democratic presidential nomination so tight, it's becoming increasingly likely that superdelegates like Brown could determine the outcome.

Superdelegates are a group of about 800 party leaders and officials who cast their votes at the Democratic National Convention. They are free to vote for the candidate of their choice. Read full article »

All About Democratic Party • U.S. Presidential Election