Prime Minister Dmitry Medvedev, once one of Russia’s most popular leaders, is now politically a “dead man walking” as his former mentor, President Vladimir Putin, undermines him, leading many to predict that the ruthless president is preparing to dump his reform-minded protege, washingtontimes.com reports. Mr. Medvedev, 47, was always the junior partner in the Kremlin duo with Mr. Putin, the 60-year-old former KGB officer. Mr. Putin has been reversing Mr. Medvedev’s reforms, making slander a crime again and imposing Kremlin control over the direct election of Russian governors. Meanwhile, the pro-Putin state-controlled media ignores the prime minister or carries negative stories about him. Analysts generally agree that Mr. Medvedev’s dismissal and political obscurity are imminent.