Big news from the West Wing: Mark Lippert, one of President Obama’s closest foreign-policy advisers, is leaving to rejoin the Navy. Lippert, who is deputy national-security adviser and chief of staff of the National Security Council, has worked for Obama since his first days in the Senate and later advised him during the campaign. Perhaps no one on the foreign-policy team, save for fellow campaign vet and top NSC aide Denis McDonough, is closer to Obama—a situation that has sometimes raised questions about the relationship between Obama and Lippert’s direct boss, national-security adviser Jim Jones.