Expect the first Potomac Primary results to start trickling in a little after 7 P.M. We'll be blogging them right here at TPM Election Central.

There's a clear consensus in the polling for tomorrow's Potomac Primary: Obama's got it made. Barring an upset/polling foul-up like the one we saw in New Hampshire, Obama seems set for comfortable victories in both Maryland and Virginia, and is heavily favored to win the majority-African-American District of Columbia. Here are the surveys from the last few days:

Maryland:

ARG: Obama 55%, Clinton 37% (Today)

Mason-Dixon: Obama 53%, Clinton 35% (Feb. 10)

Rasmussen: Obama 57%, Clinton 31% (Feb. 9)

SurveyUSA: Obama 52%, Clinton 33% (Feb. 8)

Virginia:

SurveyUSA: Obama 60%, Clinton 38% (Today)

ARG: Obama 56%, Clinton 38% (Today)

Mason-Dixon: Obama 53%, Clinton 37% (Feb. 10)

Rasmussen: Obama 55%, Clinton 37% (Feb. 9)

The new SurveyUSA poll of Maryland gives Barack Obama a big lead for this Tuesday's primary, with 52% support to Hillary Clinton's 33%. The demographics: Whites are a dead heat with Hillary at 42% to Obama's 40%, and Obama leads among African-Americans at 71%-18%. Another thing Helping Obama: Hispanics make up only 3% of the expected electorate.

In conjunction with today's SurveyUSA poll of Virginia, which had Obama up 20 points, he definitely looks like he's in good shape for this Tuesday's Potomac Primary, when a total of 168 delegates will on the line between these two states and the District of Columbia.