On the heels of a Democratic debate in which he reminded everyone that there was a third candidate, presidential candidate John Edwards is hitting both the campaign trail and the air waves.

Tonight, the former North Carolina senator is scheduled to appear on the "Late Show with David Letterman," followed by an appearance on the "Tyra Banks Show" on Friday.

In between, he's campaigning in South Carolina with bluegrass legend Ralph Stanley and actor Danny Glover.

In last night's debate in Columbia, South Carolina, tried to stay above the fray while pleading for equal time. He badly trails both Hillary Rodham Clinton and Barack Obama.

At one point, he asks "Are there three people in this debate, not two?"