Since Putin did such a fantabulous job installing donjohn as prez why not let him handle deciding in 2020 if/when donjohn is impeached?

Of course he has put so much time(5  years) and money in getting donjohn elected Putin would probably prefer him. He has already trained donjohn so that the learning curve is done. Who would be a good replacement d'ya think? Whose learning curve would be the shortest?