Do you really believe the public is informed of secret weapons systems...? if you do you're naive...Nope.
They don't have anything actively deployed in the numbers it would take to defeat them. Antimissile systems were banned by both sides to ensure mutual assured destruction. Regan caused quite the stir with the start wars stuff. Don't you remember all that? He even talked about sharing the technology with them. The premise was to use antimissile systems to counter rogue nations. The Russians thought it would be used to counter their missiles. So nope.
Strategic Defense Initiative - Wikipedia
en.wikipedia.org
The old song, 'nowehere to run, nowhere to hide' comes to mind. Slow death or quick death, you choose.
If several bouts of mobilizations (he's gonna have more) won't provide him a victory, more likely is him using tactical nukes. It's just a question where he would chuck them. Naturally, apparent choice is into Ukraine, but actually I think he'd be gunning for a sparingly populated yet tactically relevant area in Poland and/or the Baltics. A show of force, like hey look what I'm willing to do...then he's hoping for a harried peace deal in the UN in lieu of nuclear escalation.A nut job with a terminal disease might do it for spite.