Steven Waldman has another great post on TPMCafe exploring the "unitarian" middle ground of America's key Founders. It was a middle ground between strict deism and orthodox Christianity. Bottom line:
As for their religious beliefs, someone in the comment thread said I was being incoherent or contradictory by saying the Big Five (Franklin, Adams, Jefferson, Washington & Madison) were neither Deists nor orthodox Christians. Again, we’re viewing this through a somewhat warped lens. “Deist” and “Orthodox Christian” were not the only two spiritual choices. For one thing, each Founder was slightly different from each other, and changed throughout their lives. But if I had to pick a religion, I’d say they were sort of militant Unitarians. In other words, they had rejected or become uncomfortable with key parts of Christian doctrine and institutional behavior but they did believe in an active God, who intervened in their lives and the lives of the nation.