TimesOnline: Barack Obama hopes to take the lead for first time
After his weekend victories in five contests, Mr Obama is expected to gain further momentum as voters go to the polls in Virginia, Maryland and Washington DC, where he hopes to be buoyed once more by overwhelming backing from black voters who will account for a big proportion of turnout in the so-called “Potomac primaries”.
Victory tonight would leave Mr Obama slightly ahead in the delegate count for the first time.