Mainline Protestants were the second largest Protestant Christian group, followed by predominantly African American churches.
mˈeɪnlaɪn pɹˈɑːɾɪstənts wɜː ðə sˈɛkənd lˈɑːɹdʒɪst pɹˈɑːɾɪstənt kɹˈɪstʃən ɡɹˈuːp, fˈɑːloʊd baɪ pɹɪdˈɑːmɪnəntli ˈæfɹɪkən ɐmˈɛɹɪkən tʃˈɜːtʃᵻz.