Adrian Karatnycky is a senior fellow at the Atlantic Council and the author of “Battleground Ukraine: From Independence to the War with Russia.” The vast corruption scandal unfolding in Ukraine has deeply damaged the country’s image. It has also severely eroded trust in President Volodymyr Zelenskyy, turning him into a lame duck at home. Involving a plot to extort around $100 million from Ukraine’s energy sector, the scandal has so far engulfed Zelenskyy’s Justice Minister German Galushchenko,