Any opposing candidate who has good chances to win will simply not be allowed to participate in the elections. Plus total control over media.
I wonder if Russians have the right to bear arms?
When are there going to be "Nuremberg Trials" for communists and socialists who have committed mass murder, torture, and crimes against humanity in the former USSR, in today's China, in Cambodia, North Korea, South Vietnam, etc.? Tens of millions of people have been executed, starved to death, and tortured by totalitarian regimes other than Hitler's National Socialists. Many of the guilty are still living.