If we are in the world you describe, EU might as well do as it wants - its downside has been capped.
Of course it would be absolutely disgraceful for the US to drop sanctions on Russia and have normal relations with it while it continued its invasion. But that's what the US voted for.
The reason US sanctions Russia is because the US has been pushing its oil insustry in Europe. For instance, EU tariff deals included buying a minimum amount of hydrocarbon products:
> As part of this effort, the European Union intends to procure US liquified natural gas, oil, and nuclear energy products with an expected offtake valued at $750 billion through 2028.
In that context, US sanctions on Russia serve a purpose which isn't solely helping Ukraine ; I don't see the US lifting these sanctions anytime soon.
They also have another $1B budgeted in defense spending for Ukraine next year https://www.reuters.com/world/us/us-senate-committee-backs-m...
Ukraine *desperately* needs to be a nuclear weapons state. Nothing else will suffice. They need more than one bomb, really more than three or four. Putin has to be terrified that no matter how many nuclear strikes he endures, another waits to follow. When he fears that, the war will end.
As has been illustrated so well over the past few years, the power of nuclear weapons is a paradox. It allows you to make the ultimate threat. But that threat isn't credible unless people believe you'll use them. Because the consequences of using them are so severe, they're only credible if used in response to a correspondingly severe threat. Russia's arsenal hasn't allowed it to stop a constant flow of weapons to its enemy, an enemy which has invaded and still controls a small bit of Russian territory, and which frequently carries out aerial attacks on Russian territory. Ukraine faces much more of an existential threat (Ukraine has no prospect of conquering Russia, but the reverse is a serious possibility) so a nuclear threat from Ukraine would be more credible, but it could easily still not be enough. Certainly they're not an automatic "leave me alone" card.
It would be a major blow to Ukraine if the US stops selling weapons to them via European buyers. There is a real threat of this if Trump feels the need to coerce Ukraine into supporting his peace plan.
The latest demand for Ukraine to just completely surrender.
