They don't much care if Ukraine wins, they want Russia to lose as much as possible. If Ukraine wins too fast or effectively, there's a risk of Russia getting de

They don't much care if Ukraine wins, they want Russia to lose as much as possible. If Ukraine wins too fast or effectively, there's a risk of Russia getting desperate and using nukes, but also there's a chance Russia will pull back before taking as many military losses as possible through a protracted conflict.