America was not founded by Christians.

"A few Christian fundamentalists attempt to convince us to return to the Christianity of early America, yet according to the historian, Robert T. Handy, "No more than 10 percent—probably less—of Americans in 1800 were members of congregations."

The Founding Fathers, also, rarely practiced Christian orthodoxy. Although they supported the free exercise of any religion, they understood the dangers of religion."

For entire article see: http://www.earlyamerica.com/review/summer97/secular.html