They're an inferior race so it would never occur to them. They're about 200 years behind the West. They went from being monarchists to communists to a President-for-life. Russians would have been better off is the US had conquered them after WWII then rebuilt their nation as part of the Marshall Plan.
Trust but verify is an ancient maxim just like "keep your friends close and your enemies closer".
Inferior race? Look, I'm pretty conservative, but I don't go for that kind of thing. If you want to say Russian culture is inferior, that's one thing, but race is taking it to a different level. Personally, I think modern Russian culture has more to offer than the shitshow that American culture has become.