As in previous elections, differences in voting patterns by religion are amplified when church attendance is taken into account. Obama has made no headway among white evangelical Protestants who attend church at least once a week; just 17% of this group supports him. By contrast, 37% of white evangelicals who attend services less frequently support Obama.
Similarly, while he has made gains among Catholics overall, Obama runs even with McCain among observant white Catholics (45% to 45%). He now has a clear lead among white Catholics who attend Mass less frequently (53% to 38%).