Obama: Let's campaign, not have more debates

(CNN) - Sen. Barack Obama on Thursday suggested that he and Democratic rival Sen. Hillary Clinton have debated enough and that he'd rather spend his time campaigning in the closing weeks of the campaign.

The two debated Wednesday night in Philadelphia - their final meeting before Tuesday's primary in Pennsylvania. Clinton has agreed to a debate next week, but Obama has not yet accepted the invitation.

At an appearance Thursday in Raleigh, North Carolina, Obama said he has a lot of campaigning to do in a limited amount of time.

"I'll be honest with you, we've now had 21," he said. "It's not as if we don't know how to do these things. I could deliver Sen. Clinton's lines; she could, I'm sure, deliver mine."