There is a fervor now in the American church that the Constitution was inspired by God.
This, of course, is idolatry. and heresy. and, thus, a sin.
But what intrigues me is that this now seems to be standard thought for American Christians, and I do not remember this idea being taught while I was growing up. I believe that it started to catch on in the 1990s or the early 2000s.
Doing quick research, the only thing I can find is that the LDS church has been teaching this doctrine for decades (pretty interesting for a group of folks who were once literally run out of the country).
Another aside: perhaps this idea was co-opted by the Conservatives who infused it into the American church to further their agenda.
Another note: this may tie into the famous meeting between Mitt Romney and Billy Graham in 2012 which let to Graham, the next morning, to take the LDS off the list of cults.
Terminology: "American church" (small c) is a general term for Americans who consider themselves Christian. It includes, but is not limited to, the entire Southern Baptist Convention, which is the largest and most representative body of Americans who fully ascribe to the myth of American Exceptionalism.