by Rick Pluta

A little less than an hour before the polls close tonight, the Obama campaign will send its final shift of door-knockers out to the streets. In Michigan, the final mission of the day is called "knock and drag": if volunteers find a Democrat who hasn't voted, the volunteer is not to leave the doorstep until that person is off to the polling site.

The Obama campaign will also be sending volunteers out to busy precincts to keep voters from giving up. Some will be bringing water and snacks for waiting-weary voters.