Democratic Sen. Barack Obama has agreed to a matchup April 19 hosted by CBS News in North Carolina, his campaign said Thursday. North Carolina has 115 delegates up for grabs in its May 6 primary. CBS News said it was awaiting word on whether Sen. Hillary Rodham Clinton would participate.

Obama and Clinton plan to debate in Philadelphia next month before Pennsylvania's primary, their presidential campaigns said Thursday.

ABC News will host that debate on a date still to be determined. Pennsylvania voters go to the polls April 22 for their primary, a contest with 158 delegates at stake.