I found this article very interesting and insightful. Click on it to read the entire article.
The U.S. Supreme Court has concurred with this a number of times. For example, in 1892, it declared:
“Our laws and our institutions must necessarily be based upon and embody the teachings of the Redeemer of mankind. It is impossible that it would be otherwise; and in this sense and to this extent our civilization and our institution are emphatically Christian … this is a Christian nation.”