As Defense Secretary Ash Carter meets with NATO allies this week to discuss future plans to deter Russian military aggression, defense budget analysts in Washington are wondering how a potential European "rebalance" will manifest itself in the Pentagon's fiscal year 2017 spending plans amid the current fiscal fight on Capitol Hill. At present, the Defense Department is funding its European Reassurance Initiative -- a $1 billion effort to build military structures and conduct exercises with NATO nations in Eastern Europe...