The White House doesn't expect an agreement to end the war with Iran Sunday and thinks it could take several days for the deal's approval by Iran's leadership, including Supreme Leader Mojtaba Khamenei, a senior U.S. official said in a briefing with reporters. Why it matters: While U.S. officials are optimistic that a deal will be signed within days, they also acknowledge it has not been finalized and could still fall apart. The deal would avoid an escalation of the war and decrease the pressu