Yale University history professor Timothy Snyder on Saturday said that Russian President Vladimir Putin's ruling is "weakening" and noted that preparation for a power struggle is underway. Snyder pointed in a Twitter thread a sign that Putin is "losing control" is that some former Russian officials such as Dmitry Medvedev spoke about the consequences that await Ukraine and the West. Medvedev, Putin's staunch ally who served as Russia's former president, recently warned that the West's response to the Russian war in Ukraine could result in the Eastern European country losing "the remnants of state sovereignty and disappear from the world...