A secret plot to oust Russian President Vladimir Putin could already be underway within his inner circle, according to a CIA insider.
Putin's cronies could already be lurking in the wings if Russia's invasion of Ukraine fails, with concerns and speculation mounting over the president's health.
Sergei Shoigu, Russian Defence Minister and a close Putin-ally, may be central to a mutiny to overthrow the president, according to ex-CIA Moscow station chief Daniel Hoffman.
