Baptize America is a historical and theological exploration that brings to life one of the most significant yet underexamined debates in early American religious history. Centered on the 1820 Campbell-Walker debate in frontier Ohio, this book situates the controversy within a broader narrative of American identity, religious development, and cultural transformation. The dispute was a transnational and transatlantic event, and it has political and theological relevance for the 21st century, particularly for the Trump administration, and for the movement to Baptize America. At the heart of this study lies a profound question: Who should be baptized, and why?