The Obama campaign sent this email to supporters yesterday:

Friend --

Make a Matching Donation Today, I am proud to announce that our presidential campaign will be the first in a generation to deploy and maintain staff in every single state.

The network of volunteers and the infrastructure built up during the historic primary season -- on behalf of all the Democratic campaigns -- have given us an enormous and unprecedented opportunity in the general election.

We need to register new voters and bring people back into the political process. We need to reach out to Independents and Republicans who know that our country cannot afford another four years of George W. Bush's disastrous policies.

And we need to overcome the three-month head start that John McCain has had to raise money and build support.

You can help build our organization by stepping up and owning a piece of this campaign.

And cue the obligatory fundraising pitch.

In any case, of course much of this is hype. Just having an office in Mississippi doesn't mean much. But as a scare tactic it is useful. In any battleground state McCain has designs on capturing, Obama, with his vast resources, could flood the market and scare McCain out.