A common argument says immigration could help reverse America’s secular drift because immigrants are assumed to be more religious than native-born Americans. Ryan Burge’s analysis challenges that assumption. Using Cooperative Election Study data, he finds that immigrants are only slightly more religious than Americans whose families have been in the United States for generations—and not nearly enough to shift the country’s overall religious trajectory. The larger story is assimilation: immigrants, like the broader American population, are becoming more secular over time.