WASHINGTON (AP) — Seeking to salvage an elusive Middle East peace plan, President Barack Obama pressed Israeli Prime Minister Benjamin Netanyahu Monday to make the “tough decisions” needed to move forward on talks with the Palestinians.

But facing a U.S.-imposed April deadline, the Israeli leader declared pessimistically that, “Israel has been doing its part and, I regret to say, the Palestinians have not.” Netanyahu’s comments underscored the slim prospects of reaching an agreement to the long-running conflict, despite a robust effort led by Secretary of State John Kerry.