The Trump administration could be opening the door to a larger fleet of Columbia-class ballistic missile submarines than the Defense Department has planned, according to a leaked draft of the 2018 Nuclear Posture Review, which characterizes the current goal of building 12 new subs as a "minimum" fleet objective. A draft version of the document , marked "for official use only" and "pre-decisional," dated January 2018 and obtained by The Huffington Post , notes in two separate places the "Columbia...