President Obama said Saturday that the chances of a permanent nuclear deal with Iran are at best no more than even odds, but that diplomacy still must be pursued. “I wouldn't say that it is more than 50-50 but we have to try,” Obama said at a Brookings Institution event. While some in Congress are trying to move tougher unilateral sanctions now, Obama urged restraint. He said that if Iran fails to meet its commitments under the temporary deal, the U.S. will be in a stronger position to seek more effective international sanctions after six months. The president explained at...