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Trump, like every arogant POS has overestimated his strength. Europe can and will enter the conflict as Russia has proven itself to be an existential threat. NATO is dead, but EU has been planning for this. I wouldn’t be surprised if UKR already has or will obtain a nuke and put on a show of force . Nuking Russian troops on its own territory would be fine- and provide ground denial to the Russians.
Winds blow east in that part of the world.
They were counting on US support so they played nice. If Europe fails to do anything meaningful we might see UKR do something incalculable.
UKR knows that the only way to stop Putin is to match his posture. They have openly stated last year that they should get a nuke since US is unreliable.
Retaliate for nuking their own territory?