Most of us understand the Founding Fathers were men of their times, and must be viewed as such

George Washington's faith
https://www.thenewamerican.com/culture/history/item/25423-george-washington-s-christianity

But Jefferson and Franklin (Deists) and James Madison (Unitarian) fully believed in the providence of God in the founding of this nation.
John Adams was the closest to what today would be viewed as an Evangelical
"We have no government armed with power capable of contending with human passions unbridled by morality and religion. Our Constitution was made only for a moral and religious people. It is wholly inadequate to the government of any other."

https://sites.google.com/site/anotherdaysjourneybackhome/pray-for-america

The bad news, and I don't know how much longer God is going to put up with us
https://sites.google.com/site/anotherdaysjourneybackhome/pray-for-america/we-have-forgotten-god

https://sites.google.com/a/damascusknowledge.com/www/home