That's pretty declarative. You seem pretty sure the situation in the States would be comparable to that in Russia --I think that's a very tenuous stretch.
It happens in Russia because they have collusion. Presumably we would have less chance of that happening as other candidates would be free to join in on the political race. There is non-such in Putin's Russia.
In Russia, candidacies are controlled (and those two had an "understanding"), so you end up with that. Anyhow, Russia is an exception. Why do you bother bringing up an exception as in this case it would appear irrelevant?
What we do have is people who, due to name establishment (incumbency) recognition and or party backing, end up stringing together many terms --this alternative, would at least break that pattern up and give other candidates a chance due to stalled momentum (of the what would have been incumbent). It's seems an obvious difference to me.