President Barack Obama opened the second day of a nuclear-security summit here by boasting of the deal world powers reached to stem Iran’s nuclear ambitions , despite new criticism from Congress that his administration is going too easy on Tehran. Mr. Obama highlighted the benefits the deal would bring to Iran’s economy, just as his administration is preparing to increase Tehran’s access to U.S. dollars and dismantle a major impediment to Iran’s re-engagement with global commerce. “It will take time for Iran to integrate into the global economy, but Iran is already beginning to see the benefits of this deal,” Mr. Obama said, an apparent response to complaints from Tehran that the deal hadn’t delivered promised economic relief after years of international sanctions. In remarks Friday at a meeting with officials from the countries […]