“With Trump’s national-security team depleted—no permanent Secretary of Defense, no Secretary of Homeland Security, no Ambassador to the United Nations—Bolton would have extraordinary latitude in a crisis. ‘John understands that you have to get the elected leader the approval of the audience that matters … As long as Trump’s base is still applauding, then Bolton can do whatever he wants.” We often hear about White House officials who serve as a check on the president’s impulses. In the case of national-security adviser John Bolton, the roles are somewhat reversed. The New Yorker’s Dexter Filkins: John Bolton on the Warpath. Can Trump’s national-security adviser sell the isolationist President on military force?