WASHINGTON (AP) — An agreement secured with its greatest global foe, the Obama administration pleaded Tuesday with a more familiar if often difficult negotiating partner not to scuttle last weekend’s Iran nuclear deal: Congress.

Just back from his diplomatic triumph in Europe, Secretary of State John Kerry delivered a video message to legislators as he urged that they not introduce new economic measures against Iran at a time the U.S. and fellow world powers are withdrawing some sanctions in exchange for the Iranians curtailing their nuclear program.