President Putin has replaced his top aide -- the Chief of Presidential Administration. The new bureaucrat is the governor of the Siberian region Tyumen Oblast, Sergei Sobyanin - a very strong regional politician. The reasons for this appointment are that Sobyanin is an experienced manager, he doesn't have political baggage in Moscow circles, and doesn't relate to any interest group in Kremlin. However, experience shows, that all the regional successful politicians, who end up in Moscow see a steep decline in their careers, due to zero opportunity for further development and lack of powerful friends in the city.