If that scenario is defined as "Russia and Ukraine are currently engaged in battle" then sure. The United States and NATO are not at war with Russia and I'd prefer it stay that way.
Funny thing that word "war"... By that definition US has never been at war with Russia/USSR yet a large part of last century was called "The Cold War". Kinetic war is not the only form of warfare.
You are free to blur the lines all you want, but OP and everyone else here knows what the end game is and they're going to drift that direction regardless of what people like me say about the dangers of doing so.