In recent years, Putin has insured that nearly all power in Russia is Presidential. The legislature, the State Duma, is only marginally more independent than the Supreme Soviet was under Leonid Brezhnev. The governors of Russia's more than eighty regions are no longer elected, as they were under Yeltsin; since a Presidential decree in 2004, they have all been appointed by the Kremlin. Putin even appoints the mayors of Moscow and St. Petersburg. The federal television networks, by far the main instrument of news and information in Russia, are neo-Soviet in their absolute obeisance to Kremlin power.
There's also an audio interview of Kasparov by Remnick.