And what will happen? Will the GOP do anything? Will the rest of NATO deal a devastating enough blow to Russia that it is forced to retreat? Will Russia not retaliate with a limited nuclear escalation?

Don’t forget that the whole “Iron Dome” thing Trump has been talking about, if viable, would necessarily prompt immediate attacks before it becomes operational.

>if viable

Well, fortunately there's no way it could be viable, but that's relying on China and Russia to not fall for it.