I have no idea....our first foundational documents prove that God was a part of all the founding of our nation. They wanted freedom "to worship" in any way they chose....not freedom "from worship"...and anyone can easily prove it.
The revisionists would love to change it, but they can't. These early founders also kept personal diaries that told exactly what they believed in, and why.
The church of England, that they fled from, was oppressive and that's what they didn't want....but they did want to worship God in their own way. And they did want God a part of the public square in everything they wrote, planned, or developed b ecause they knew it was important to the society as a whole. Read the original documents and writings for yourself and don't listen to those who want to eliminate all worship of God. Because when they succeed, evil will take control...and it is already happening more and more.