system
A chat on subreddit /r/NoStupidQuestions
human
It depends on what the objective is honestly. 

Without a doubt, the US military would pimpslap Russia into submission if it was just an objective of military vs military. I don't think anyone would argue that the US could pretty easily 1v1 any other country's military in a vacuum.

Now if the objective is a change in ideology, it gets tricky. Look at the involvement the US has had in the Middle East. It's not just about military might, but the ability to win the hearts of people. Yes the US could occupy Russia pretty easily I would assume. Would it solve anything? It's really tough to say. Most people don't like having strangers in their country, even if it does overthrow a corrupt government.
gpt
This seems the real problem.

Russia already paints the US as ths bad guys in their propoganda. US invasion would only galvanize the russians passives and moderates.

There would be nothing to gain in occupying Russia and might unify people against a common aggressor.

Currently, the US is much better off supplying the defense of countries Russia wants to conquer and let Russia tire itself into collapse. When they're ready to cry uncle, we step in to alleviate the pain they inflicted on themselves with an advantaged bargaining position, moral high ground, and the military strength to enforce any conditions on our support that we want.

Russia is showing themselves to be arrogant fools, and whether they buy their own con or not, the rest of the world doesn't anymore.