The Democrats divided

Potomac primary
Signs for Sen. Barack Obama fill the back window of a car heading toward Capitol Hill in Washington, DC.
Photo by Brendan Smialowski/Getty Images

While Republican presidential candidate John McCain hopes the Potomac primaries will help him shore up conservative support and put an end to Mike Huckabee's campaign, the Democratic race remains a tossup between Hillary Clinton and Barack Obama.

The party nomination could be decided by a small group of superdelegates, or the Democrats could be headed for a brokered convention.