Sign up for the Slatest to get the most insightful analysis, criticism, and advice out there, delivered to your inbox daily. Most people would agree that the U.S. is experiencing a deep partisan divide. It’s fueling a particularly insidious form of extremism that has resulted in a growing number of violent acts against politicians, judges, and activists, plus their families. Charlie Kirk’s death this week is the latest example, and it prompts the question: Is America in its assassination era? The question is a long time coming. Back in 2017, white supremacists marched through the University of Virginia for the...