UPDATE: Hillary Clinton in Northern Virginia tomorrow

Hillary Clinton is expected to make a campaign stop in Northern Virginia tomorrow (location still to be announced) ahead of next Tuesday's primary elections here.

Because of high concentrations of African American and well-educated voters, many political strategists say Obama (D-Ill.) could have an early advantage in all three states, but Clinton strategists say the New York Democrat will campaign hard across the region. Clinton strategists are especially optimistic about their chances in Virginia, where her campaign dispatched several operatives experienced in state elections.

"We believe we can do very well" in Virginia, Clinton spokesman Mo Elleithee said.

Clinton is planning to hold a rally tomorrow in Northern Virginia, though a location has not been determined. Yesterday, the Clinton campaign unveiled a list of 100 Democratic advocates from across Virginia who will serve on her state campaign steering committee.

Obama was endorsed by nearly half the Democrats in the Virginia Senate, including one who had previously backed Clinton and several who had supported former senator John Edwards (D-N.C.), who ended his campaign last week.

There are 238 delegates to be won between Virginia, Maryland and Washington, DC.