Along with Putin's vision for Mother Russia, he is a canny SOB. He is testing us continually. There is no benefit to Russia whatsoever to get in an arms race primarily because they can't afford to. Trump's track record is mostly perfect in these types of deals. Don't do what you're supposed to do, we walk away. Then what follows is an entirely new deal and one that is usually better for us. The world is slowly coming to understand that we are no longer the big pussy and pushover that we've been for the last decades since Reagan term limited.