What does it mean to claim the US is a Christian nation, and what does the Constitution say?

FILE - A statue of Benjamin Franklin is seen at The Franklin Institute, Tuesday, Feb. 10, 2015, in Philadelphia. Franklin, like some other key founders, admired Jesus as a moral teacher but would not pass a test of Christian orthodoxy. (AP Photo/Matt Rourke, File)

Many Americans believe the United States was founded as a Christian nation, and the idea is energizing some conservative and Republican activists. But the concept means different things to different people, and historians say that while the issue is complex, the founding documents prioritize religious freedom and do not create a Christian nation.

Does the U.S. Constitution establish Christianity as an official religion?

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