You have frequently cited the progress of Iran's nuclear weapons program, despite the Administration's leading efforts to fashion multilateral and unilateral sanctions against Iran. We support the Administration's efforts, but we believe that there is still much more that must be done to prevent Iran from obtaining a nuclear weapons capability. We want to assure you of broad, bipartisan support in Congress for use of the full measures of U.S. economic, deiplomatic, and political power to thwart Iranian nuclear ambitions.