What do you mean? Europe has contributed twice as much to Ukraine compared to USA. Yeah, in plain military spending USA has given more, but a war isn’t won with just guns. This has been a strategy that has made sense given USAs military industrial complex, and EUs geographical proximity to Ukraine.

If USA pulls out it’s likely that EU will shift some of its aid over to military. This is already happening: European countries have started setting up arms production within Ukraine which gives Ukraine more guns per dollar spent than what donations of western built weapons does. So don’t think the dollar amount donated tells you everything about the amount of military support given.

"There's a huge difference between invading a NATO member and invading a non-NATO member."

In practise, doesn't that depend on what the US decides?

It does insofar as the US can "decide" to betray all of its allies by ignoring its obligations under a military alliance. We've already publicly proclaimed to the entire world that the American military will come to the aid of any NATO member which is invaded. We've never had such an agreement with the Ukraine and thus owe no obligations towards them.

> It does insofar as the US can "decide" to betray all of its allies by ignoring its obligations under a military alliance.

This is a threat Trump has made openly and repeatedly.

Russia has plenty of meat for the grinder. Being embarrassed isn't gonna stop them.

They aren't even going to be embarrassed - Ukraine will get a peace deal forced on it and Russia will declare a glorious victory and that will become the history that everyone remembers.