It is sort of metaphorical that he’s shutting down Main Street USA for his speech.
[Update a few minutes later]
Heh: “Embargoed excerpt of President Obama’s remarks at Disney World, FL, today: ‘It is a small world, after all. It is a small, small, world.'”
[Early afternoon update]
Here are the actual photos. As noted over there, this is surefire campaign-ad material.
[Update a couple minutes later]