Complex sentence: Despite some influence from evangelicals and Mormons, the western regions of Idaho, Montana and possibly Colorado may also be included, and some Northeastern United States regions like New York City and certain parts of New England were said to be unchurched.
Split into simpler sentences: Despite some influence from evangelicals and Mormons, the western regions of Idaho, Montana and possibly Colorado may also be included. Some Northeastern regions like New York City and certain parts of New England are said to be unchurched.