If that were true, the rational move for the US would have been to back off and let Putin's imperialist vision continue to unfold unimpeded. Eventually there w

If that were true, the rational move for the US would have been to back off and let Putin's imperialist vision continue to unfold unimpeded. Eventually there would be an enormous market for weapons to eject his forces from Eastern Europe and points west. What history tells us, though, is that the best time to stop Putin was 2014, and the second best time is now.