Is traditional religions such as Christianity really in decline in USA, or not?

Is traditional religions such as Christianity really in decline in USA, or not?

News: New Harvard Research says U.S. Christianity is not shrinking, but growing stronger.

http://thefederalist.com/2018/01/22/new-harvard-research-says-u-s-christianity-not-shrinking-growing-stronger/ (Links to an external

site.)Links to an external site.

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