In a phone call yesterday with Israeli PM Benjamin Netanyahu, President Joe Biden made two central demands: First, to allow the flow of humanitarian aid; second, to empower negotiators to broker a cease-fire and hostage deal. If that sounds like a marked change in Biden’s posture, it is: The killings this week of seven aid workers with World Central Kitchen seems to have fundamentally shifted the calculus at play for the U.S. in Gaza. National security reporter Alex Ward joins Playbook co-author Ryan Lizza to break it all down.