The Christian Right has been an active force in Republican and American politics for over 40 years. Its focus on morality politics (abortion, euthanasia, same-sex marriage, pornography, and sex and science education) has had an impact on the fortunes and expectations of conservative candidates, activists, and organizations all over the country. Its comprehensive activity demonstrates the multifaceted changes in society and religious engagement that brought the Christian Right as a political force into supporters’ consciousnesses, their churches, and the voting booth. Success in mobilization and the ballot box has not always created policy change, though the movement can claim policy victories in many states and localities. The largest impact the movement has had is in the Republican Party in all of its incarnations, altering the policies and strategies that are important and successful for the party. The incarnation of the movement shows signs of significant change, however, as the Republican Party is transformed by the populist messages and policies of the Trump administration. Scholars of the Christian Right movement and religion in American politics more generally should pay attention to the varying narratives, issues, sources of power, and social cohesion that the movement and its constituency, largely conservative Protestants, display. Like research on many social and political movements, the study of the Christian Right benefits from an interdisciplinary approach and a good grasp of the lived experience of the supporters, activists, and leaders within the movement.