“How’s that been working with the Chechens ... :-) and how are the terrorist bombings going these days? “
I don’t know, I have no idea what retaliatory actions that they may or may not take, may or may not have already done and/or may not ever be known, or what the thresholds for those actions are. That’s how the implied “uncertainty” part of “certain response” works, which, after working fairly well for 60 years or so, the Strategic Genius of our Time has now upset.
He truly is on a mission to destroy this nation/