Positive outcomes I see is that much like with the US's unequivocal support of Israel, this devastates the US's reputation and foreign influence. Trump wants to abandon Europe and Ukraine, which might grant Europe the independence and the urgency to step up and support Ukraine itself, unfettered by dysfunctional politics back in the US. A third pole on the world power stage would improve things, the US isolated back home in its infighting and staying out of the rest of the worlds business. IF the EU steps up.