A week ago, Joe Biden’s national security adviser, Jake Sullivan, sounded optimistic about the region. Updated at 3:12 p.m. ET on October 7, 2023 What a difference a week makes. Just eight days ago, National Security Adviser Jake Sullivan, speaking at The Atlantic Festival, rattled off a long list of positive developments in the Middle East, developments that were allowing the Biden administration to focus on other regions and other problems. A truce was holding in Yemen. Iranian attacks against U.S. forces had stopped. America’s presence in Iraq was “stable.” The good news crescendoed with this statement: “The Middle East...