A little research never went amiss all the same, IPity. You never know what you might actually learn if you set your mind to it.
It most definitely is the belief of the State Department that Putin is some sort of wildly dangerous individual who must be stopped (and if I were Putin I would be seriously concerned about the US engineering some sort of coup in Russia) but actually I agree with what I can make out of Trump's garbled statement wrt Ukraine. His pov is essentially that Putin got what he wanted in Crimea and is not interested in any more of Ukraine, while the ethnically Russian eastern Ukraine has managed to fight the Ukrainian government and its various militias and mercenaries to a stalemate in the Donbass. Ukraine cannot begin to pull itself out of the political and financial morass it is in until it can stop haemmoraging money into a low level conflict, so why not cut its losses and move on. The east is not going to reconcile itself to a future with Ukraine, whose leading western politicians have expressed open animosity towards its culture, language, and political sympathy, with one stating the inhabitants of the east should be nuked.
If Northern Ireland could split off from a post independence island of Ireland and remain part of the UK, why couldn't Eastern Ukraine separate from the rest of Ukraine?
If you think there is something wrong with separating Ukraine into two parts based on culture, political sympathy, and language, and genuine fear on the part of ethnic Russian people of being treated as strangers in their own country, then what is your opinion of the United Kingdom of Great Britain and Northern Ireland?