In some wars, a single figure can be a strategic factor. A Lincoln, a Clemenceau, a Roosevelt. Churchill. Ukrainian Pres. Volodymyr Zelensky’s performance in the war’s first week has vaulted him onto that list. But as well as the comedian-turned-actor-turned-president has done, he’s also now being hunted by Russian forces. And what happens to him will change the course of the conflict. Russian Pres. Vladimir Putin’s declared war aim is to “demilitarize” Ukraine, but he’s also likely looking to overthrow the Ukrainian government. Reportedly, Zelensky and his family are at the top of the Russian target list, and the Kremlin’s...