NPR’s Tom Gjelten writes, “With the number of Americans who do not attend church or identify with any organized religion increasing, immigrants are accounting for a larger share of the Christian population.” One-fourth of all U.S. Catholics and 40 percent of Eastern Orthodox Christians are immigrants. “The increased dependence on immigrants to fill U.S. church pews means that Christian leaders have a big stake in the current debate over immigration policy,” Gjelten writes. “While many cite the biblical instruction to welcome the stranger, some have a more existential concern for supporting a generous approach: Without immigrants, they fear the U.S. Christian church may not survive in its current form.”