US immigration policy exhibits a distinct and observable favorability towards evangelical migrants, a phenomenon often attributed by scholars to national security concerns and perceived economic impacts. While historical events and societal values undeniably shape immigration intricacies, existing analyses frequently overlook the significant role of political parties. Electoral incentives drive parties to strategically advocate for policies that mobilize key support bases. The Republican Party, recognizing evangelical communities as a loyal constituency, has actively pursued immigration policies aligning with their interests. This study examines the complex and multifaceted connection between evangelical Christianity and US immigration policy. By analyzing the historical relationship between American evangelicals and the Republican Party, it reveals a strategic alignment. Tapping into the evangelical community has served the Republican Party’s interest in bolstering its political standing amidst intense competition. Consequently, immigration policy consistently favoring evangelicals reflects this dynamic interplay and the enduring influence of a major US political party on immigration issues. This paper argues that evangelical Christianity transcends mere religious identity, functioning as a crucial political asset for the Republican Party. By strategically aligning with evangelical values, the GOP crafts immigration policy in ways that resonate with voters’ religious convictions, thereby furthering the party’s political ambitions within the American immigration landscape.