UPDATE: Obama has now agreed to the Pennsylvania debate. Plus, he's accepted another debate in North Carolina:
Sen. Hillary Clinton's campaign has accepted ABC's invitation for a 4/16 debate in Philadelphia.
So has Obama -- but he's also accepted a debate for 4/19 in North Carolina, one hosted by Katie Couric and Bob Scheiffer of CBS News.
Hillary Clinton has agreed today to attend a debate in Philadelphia. The Obama camp has not said yet whether they will agree.
Read Clinton's memo:
The Clinton campaign today announced that Hillary has accepted an invitation to participate in a primetime debate hosted by ABC. The debate will be held in Philadelphia, PA in advance of the April 22nd Pennsylvania primary. The debate will be broadcast statewide and nationally.
Hillary is prepared to show she has real solutions for the problems facing residents of the Keystone State.
Hillary is the only candidate with a plan to end the housing crisis and help people keep their homes. Hillary's plan takes bold action to stem the tide of foreclosures with a 90-day moratorium on foreclosures and a five year freeze on interest rates for subprime mortgages.
Hillary is also the only candidate with a health care plan that covers every American. Her plan allows for maximum flexibility while making sure health care costs are affordable for working families.
Hillary hears the voices of Americans concerned about their future and is focused on providing solutions to the problems they face.
Check out Huffpost's coverage of the Pennsylvania primary.