One of the most disturbing trends in the American political system is the rapid ascent of the far right. As FiveThirtyEight editor Nate Silver recently noted, “The most conservative Republicans in the House 25 or 30 years ago would be among the most liberal members now.” In “Why Voting Matters,” my latest report for Demos, a progressive public-policy organization, I make the case that higher turnout would dramatically change policy in the United States by moderating the power of the far right.