George Perkovich, Wrong Approach to Iranian Nuclear Talksbr Carnegie Endowment for International Peace - Carnegie Endowment for International Peacebr The next president must revise Washington's approach to Iran if the United States hopes to halt Iran's enrichment activities and address Iran's role in other issues of critical importance to the United States.In a discussion held at the Carnegie Endowment, George Perkovich and Karim Sadjadpour suggested steps the next U.S.