

I dont think Putin would let him nuke Ukraine. Beyond issues with it being on their border, and their own military forces occupying part of the country, a missile launched from the US towards Ukraine is going to look a whole lot like one launched from the US towards Russia, at least at first, and the nature of nuclear conflict is such that you generally would launch your own missiles when you see your rival’s missiles coming, rather than waiting to see where they land. Trump seems to care what Putin wants, and nobody is going to want their main rival, even if their leader is currently one you have influence over, to be launching nuclear missiles in the direction of one’s country.
The EU is even less likely, since France is both one of its most prominent members and a nuclear power itself.
I was going to say a Naboo starfighter