Secretary of State John Kerry is casting the choice on the Iran nuclear deal in stark terms — an agreement that would limit the Islamic nation’s nuclear program, or no deal at all.

Kerry is testifying before the Senate Foreign Relations Committee as the Obama administration publicly defends the much-debated accord. The administration is facing unified Republican opposition and doubts among some Democrats.

Kerry also argues that if the deal is rejected, the diplomatic support the United States has garnered in recent years would evaporate.

He tells the panel: “It’s a question of how do you hold their program back.”

Associated Press