U.S. likes tossing its 'allies' like used tissues. American support for Ukraine is not based on ideological reasons like to promote democracy or whatever (see 2014). Russians are dead, Ukrainians are dead, MIC made the $$$ however U.S. failed to weaken Russia economically, Ukraine lost 18% of its resource rich territories etc. If the western installed Government remains in power, it'll have to sell off whatever public assets it has left to American corps.
US support for Ukraine makes sense in a selfish geopolitical move. Russia is now so weak they couldn't possibly wage war against anyone else, for the low cost of enabling Ukraine to do what they wanted to anyways.
However continued support for allies is always dependent on political winds, and the US is particularly turbulent right now.
US is nothing but consistent in its support for ethnic cleansing from Donbas to Gaza.
