Something else DJT and Putin know - and likely Poles as well - Russia’s war policy is: if attacked with conventional weapons, they will respond with nuclear.
So any putative war 0bama starts will go nuclear at once. All bets are off here.
All S-300/400/500 systems are nuclear capable ... Russia has long had 1.0 - 0.5kt warheads for ICBM defense.
Perhaps it's naive, but I honestly think Putin wants to work with Trump for the betterment of both nations, and would somehow make it crystal clear to Jugears that he would pay a *personal* price for any further attempts at kicking something off.