WASHINGTON (AP) -- President Barack Obama will speak about the breakthrough in the Iranian nuclear talks from the White House.
Obama was scheduled to be away, but he delayed his departure as negotiators in Switzerland hammered out final details of a framework agreement.
Obama has invested significant political capital in the nuclear negotiations. The talks have strained the U.S. relationship with Israel and deepened tensions with Congress.
One of Obama's toughest challenges will be convincing Congress to hold off on legislation that would authorize new sanctions on Iran. The president has warned that the legislation could upend the delicate diplomacy.