Gorbachev tried. They lost all of their former slave colonies (republics)in the process, or did you forget about that. And they ai'nt going back. They lost all influence in eastern Europe as well. Former iron curtain countries such as Pland , the Chech Republic, and Hungary are doing quite nicely as US allies now. People can migrate to and from Russia now. They will not be defeating anybody anytime soon.
You are missing the longer range picture here. The EU is firmly socialist and has been dubbed "Soviet Europe" by none other that Gorbachev. And we are currently fighting Russia when we take on al-Qaeda. Russia is behind 9-11!
Oh yes, and we the USA paid them ten of billions of dollars for that ransom of eastern Europe.