Aweek after then-Vice President Joe Biden began pressuring Ukraine to fire its chief prosecutor in late 2015 by withholding U.S. loan guarantees, the European Union reached internal consensus in a memo saying that Prosecutor Viktor Shokin’s office and the country at large had met its goals for fighting corruption, organized crime and human trafficking. The newly revealed memo directly undercuts the narrative crafted by Democrats during Donald Trump’s first impeachment and sustained during the 2020 presidential election, namely, that Biden fired Shokin over U.S. and European concerns that he wasn’t fighting corruption aggressively enough. At the time, Shokin was investigating...