In case of radical changes to the nature of the war (e.g. direct NATO involvement or vice-versa collapse of the main frontline resulting in preponderant Russian control with resistance guerrilla in mountainous regions only, much cheaper to support) how will you resolve?

How will this be resolved? Is it about weapons supply or aid in general? A PBS-published poll, any poll, an average of polls?

Traditionally, Americans start out with strong support for a war that fades over time. Wars should be accomplished in about three years to retain strong support. Of course, as with Vietnam and Afghanistan, wars can be continued far after they have lost public support.