FILE - In this June 14, 2019, file photo, Russian President Vladimir Putin, right, toasts with Chinese President Xi Jinping prior to the Conference on Interaction and Confidence Building Measures in Asia (CICA) in Dushanbe, Tajikistan. Putin and Xi have established themselves as the world’s most powerful authoritarian leaders in decades. Now it looks like they want to hang on to those roles indefinitely. Putin's sudden announcement of constitutional changes that could allow him to extend control way beyond the end of his term in 2024 echoes Xi’s move in 2018 to eliminate constitutional term limits on the head of state. (Alexei Druzhinin, Sputnik, Kremlin Pool Photo via AP, File)