The abrupt withdrawal of a top Trump National Security Council appointee and the dozens of high-level personnel holes across key foreign policy and defense agencies have national security experts posing a dark question: Will Donald Trump be ready to manage a national security crisis from Day One? Sources close to the transition describe Trump’s national security staffing as a “black box,” leaving everyone from Obama officials to Trump job seekers to foreign diplomats guessing at who will land crucial positions shaping policy and managing crises.Much of the speculation focuses on the NSC, which plays the vital role of coordinating foreign policy and national security within the White House.