First off, what's the playing field for the Dems? There's a caucus in Nebraska, a caucus in Washington, and an election in Louisiana.

Let's start with Louisiana. Half of the Democratic electorate is expected to be black, meaning that the demographics will mirror South Carolina and other Southern states that Obama has won. There has been no polling, but Obama has spent a lot of time in the state and has said all the right things about hurricane recovery, which, according to local reports, is the only issue in the Bayou State. Obama has also outspent Clinton in advertising there. Expect Obama to win handily.

Next, Nebraska. It's a caucus state, which have gone almost universally for Obama in this primary season (presumably because (1) Obama's supporters are more committed, (2) Obama organizes better than Clinton, and (3) there's no Bradley Effect at work). Obama has also won almost all of the Mountain/Prairie primaries — he took 74% in neighboring Kansas on Super Tuesday, for example. Obama also has endorsements from the state's two biggest Dems, Senator Ben Nelson and Omaha Mayor Mike Fahey. Again, expect an Obama victory.

Washington is another caucus state. It is the bluest state of the day, meaning more core Democrats for Hillary Clinton, but it also the only open primary on the slate, meaning independents can vote for Obama. There's only been one poll in the state according to pollster.com, and it shows a double digit lead for Barack Obama. (By the way, early turnout reports say it's going to be huge huge huge.)

So a sweep is possible for Obama. The Obama campaign's internal delegate memo that was accidentally released to the press recently shows that Obama's people expect to win all of the states today, and the Clinton campaign shot an email to reporters downplaying expectations. We'll keep you posted.