Washington (AP) Audience and voters participating through the internet will be asking the questions at tonight's presidential debate in Nashville.
Tom Brokaw will moderate the town hall style format at Belmont University.
The debate comes exactly four weeks before election day, and John McCain is seen as having the most riding on the meeting. Polling suggests Barack Obama is approaching the 270 electoral college votes needed for victory.
But McCain is said to be more comfortable than Obama in the town hall-style confrontation.
The target audience in the debate will be the roughly 10 percent of the electorate who say they're undecided, as well as the additional 25 percent who say they could change their minds between now and November 4th.