various regions Ethnic groups  (2002) 79.8% Russians 3.8% Tatars 2.0% Ukrainians 1.2% Bashkirs 1.1% Chuvashes 12.1% Others and Unspecified [1] Demonym Russian Government Federal semi-presidential republic  -  President Dmitry Medvedev  -  Prime Minister Vladimir Putin  -  Chairman of the Federation Council Valentina Matviyenko ( UR )  -  Chairman of the State