Republican lawmakers in the House grilled Secretary of State John Kerry and other Obama administration officials on the Iran nuclear deal on Tuesday.
In tense exchanges Kerry, Energy Secretary Ernest Moniz and Treasury Secretary Jacob Lew vigorously defended the historic accord between Iran and six world powers aimed at curbing Tehran's nuclear program.
Kerry urged lawmakers to support the deal saying that "walking away" would the wrong message to the international community.
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"If we walk away, we walk away alone. Our partners are not going to be with us," Kerry said. "Instead they will walk away from the tough multilateral sanctions that brought Iran to the negotiating table in the first place. And we will have squandered the best chance that we have to solve this problem through peaceful means."