Surge along the Potomac.

And now, 8-for-8. Sen. Obama sweeps the Chesapeake primaries, taking Virginia by 29 (64%-35%), Maryland by 23 (currently 60%-37%), and the District by 51 (75%-24%). Best of all, he won across the board and made clear and undeniable in-roads into Clinton’s demographic base. Next stop, Wisconsin and Hawaii, which Sen. Clinton seems to be ceding for her Giulianiesque firewall of Ohio and Texas. (I’m not sure why — both could feasibly play to her strengths.) Update: Clinton’s going to Wisconsin after all.

Capping the night of victories was another splendid speech by Obama, one that clearly and organically weaved some Edwardsian bread-and-butter populism into the existing stump speech. Sen. Obama also spent some time going after John McCain, and, after ekeing out Virginia on his end, McCain returned fire. We still have a ways to go on the Democratic side, of course, and I’m definitely not counting the Clintons out yet. (If anything, they’re more dangerous than ever.) But, Obama’s definitely got the Big Mo. And, at least during the speeches tonight, it was starting to look and sound like a general election…

Update: The target for the Clinton campaign right now appears to be 56% — that’s the percentage of remaining delegates Senator Clinton need to win to defeat Senator Obama in the overall pledged delegate count. But, according to media poobah Howard Fineman, at least, even the Clinton campaign concedes that’s not going to happen, despite all the talk about the firewall strategy in Ohio and Texas. Instead, barring a monumental collapse by the Obama campaign, the Clintons are basically looking for they closest they can get to a photo finish, followed by the superdelegates breaking against the will of the pledged delegates. I seriously doubt that dog will hunt.