Sanctions on Iran created the pressure necessary to compel Iran to agree to a deal with the international community last year. In exchange for economic relief, the Iranian government agreed to curb its nuclear weapons capability. The effectiveness of Iran sanctions can be traced directly to the diligence and creativity of policymakers in Congress and in this administration, as well as the previous one. Specifically, the leadership of U.S. lawmakers and executive branch implementation and enforcement officials helped to craft a coherent international message regarding Iran’s threatening proliferation behavior, a multilateral coalition to isolate Iran diplomatically and financially, and the collective financial leverage so critical to delivering the Iran nuclear deal. This deal was a major step forward in proliferation security in the Middle East and I applaud the work of this Committee for your important role in facilitating effective nuclear diplomacy.