And there really is no need to explain tactical nukes to me. I teach a class called "Weapons of Mass Destruction."
Hopefully all of this is just to try to get Trump to pressure Ukraine to make a deal. But it would not surprise me at all if Putin thinks that the critical shortages of munitions caused by the idiot war provides him a window of opportunity to try to split NATO.
If he does, then there is no predicting what would happen next.