Evangelical Christians hold their hands out in prayer during the annual March for Jesus in downtown Rio de Janeiro, Brazil, in 2013. Evangelicals play an increasingly large role in the nation's politics. Victor R. Caivano/AP hide caption

itoggle caption Victor R. Caivano/AP

Republican presidential candidate Mitt Romney pauses during a visit to St. Paul's Lutheran Church while campaigning in Berlin, N.H., on Dec. 22. Charles Krupa/AP hide caption

itoggle caption Charles Krupa/AP