Iraq depends on Iran for more than one-third of its power generation — a major sticking point as Washington prepares to re-impose sanctions. Iraq is negotiating with the U.S. for exemptions from the impending snap-back of sanctions against Iran, arguing that it could not cut consumption of Iranian electricity and natural gas immediately without suffering serious economic harm and social instability. An Iraqi delegation was in Washington last week seeking a waiver for its cross-border trade, meeting with senior officials in the State Department, Treasury Department, and National Security Council, according to multiple officials familiar with the talks.