WASHINGTON—Supporters of the Iran nuclear deal see growing momentum on their side in the Senate, raising the possibility they'll be able to block a disapproval resolution and protect President Barack Obama from having to use his veto pen.
Such an outcome — which looked all but inconceivable in the days after the deal was signed July 14, and remains a long-shot — would be a major victory for Obama, who is staking his foreign policy legacy largely on the agreement struck by the U.S., Iran, and five world powers to dismantle most of Iran’s nuclear program in exchange for billions in sanctions relief.
