The negotiating endgame with Iran is upon us. The Obama administration had no choice but to hold fast to the March 31st deadline, allowing further time only to add detail if a framework agreement can be reached. Restiveness on Capitol Hill is growing and Republican support is hard to detect. Extending these talks once again would whip up stronger opposition in Congress without providing any additional leverage on Iran’s Supreme Leader to make concessions. A firm deadline is needed to finalize an agreement that effectively constrains Iran’s bomb-making capabilities in verifiable ways.
Supporters and opponents of trying to reach an agreement with Iran have tried to move the goalposts for an acceptable agreement as the negotiations have progressed. U.N. Security Council resolutions beginning in 2006 have demanded that Iran suspend its enrichment program. The Government of Israel, vocal domestic critics, and Members of Congress who oppose an agreement now insist that Iran have no enrichment capability whatsoever. For its part, the Obama administration and its negotiating partners have shifted from suspension to allowing enrichment under observable constraints.