Much has been written about “Millennial” participation in politics, but the youngest eligible voters in the 2018 midterms belong to the post-Millennial generation, sometimes called Generation Z. These young people, born after the mid-90s, grew up with the Internet, smartphones, and social media while watching news of school shootings and having active-shooter drills in their own classrooms. They also grew up watching, and sometimes joining, movements for more equality, fairness, and safet...