Ideally, of course, the Ukrainians would throw the Russians completely out of the country with NATO’s weapons, but no active assistance on the ground or in the air. It is highly unlikely, lacking NATO’s offensive capabilities, that they can do so. With that in mind, what should NATO be looking to accomplish here?
Two things: to minimize the loss of Ukrainian sovereignty in the event of a deal; and to degrade the Russian military to the point that it won’t try it again. Realistically, we can’t do anything more than that.