[cnn-photo-caption image= http://i.l.cnn.net/cnn/2008/images/02/12/art.voting.ap.jpg caption="Marilyn Hart casts her ballot in the primary election at the Ray of Hope Baptist Church, Tuesday."]WASHINGTON (CNN) - Business was brisk at polling places in Virginia and Maryland Tuesday where primaries could answer key questions in the Democratic and Republican nomination races.
The District of Columbia voters are also participating in the so-called "Potomac primaries" - named for the river that separates Virginia and Maryland and flows past the nation's capital, Washington.
At stake in the primaries are 238 Democratic delegates and 119 total GOP delegates. Polls in Maryland and the District of Columbia close at 8 p.m. and in Virginia at 7 p.m.
In Maryland, turnout was anticipated to be about 40 percent, which is above normal according to Ross Goldstein, deputy administrator for the state's Board of Elections.