Weren’t most of the Founders, at least those who professed Christianity, Protestant?
All were Christian, four were Catholic and the rest were Protestant.
However, all of them shared the very same moral philosophy which descended from Aquinas and the School of Salamanca.
Protestants of all shades. The old Puritanism had divided into several camps, and the new evangelical movement, led by men like John Wesley, tried to straddle the theological fence between Calvinism and liberalism, or if you like bridge the theological divide by converting the masses to meaningful worship though appeals to piety. The national elite hung onto to the old broad church, lattitudinal solution associated with the Church of England without endorsing any single body. When they did use the term “religion,” they WERE thinking of Protestantism. However, thecentral government they created was designed not to be like the European monarchies. No king, no titled aristocracy, no state church. But the dual sovereignty they established did allow the state to support a particular body such as the Congregational church in Connecticut. Eventually all the state church disappeared paradoxically as the evangelical movement managed to bring the majority of the people into the several sects, now called denominations. One historian has spoken of protestantism in 1860 as the “unofficial established church of the United States.”