Maryland primaries— poll closings EXTENDED to 9:30 p.m. ET due to weather
Total elected delegates at stake Tuesday: Dems 168, GOP 113
D.C. — Delegates: 15 Dems/16 GOP
Maryland — Delegates: 70 Dems/37 GOP
Where they are tonight: Obama expected to speak in Madison, Wis. Clinton holds rally in El Paso, Texas. McCain expected at an election night party in Alexandria, Va.