James Madison (1751-1836) was known as the "Chief Architect of the Constitution" and was the 4th President of the United States from 1809-1817.  He was a member of the first United States Congress and was the original author and promoter of the Bill of Rights, of which he made religious freedom the first item.

"Cursed be all that learning that is contrary to the cross of Christ." - "America's Providential History," by David Barton, pg. 93

"Religion is the basis and Foundation of Government." - "The Papers of James Madison," by Robert Rutland, pg. 299, 304

"It is the duty of every man to render to the Creator such homage . . . before any man can be considered as a member of Civil Society, he must be considered as a subject of the Governor of the Universe." - "The Myth of Separation," by David Barton, pg. 120

"We have staked the whole future of American civilization, not upon the power of government, far from it.  We have staked the future of all of our political institutions upon the capacity of mankind for self-government; upon the capacity of each and all of us to government ourselves, to control ourselves, to sustain ourselves according to the Ten Commandments of God." - 1778, to the General Assembly of the State of Virginia

"Religion, or the duty we owe our Creator, and manner of discharging it, can be directed only by reason and conviction, not by force or violence;" - "James Madison and Religious Liberty," by Gaillard Hunt, pg. 166

"The belief in a God All Powerful wise and good, is so essential to the moral order of the World and to the happiness of man, that arguments which enforce it cannot be drawn from too many sources nor adapted with too much solicitude to the different characters and capacities to be impressed with it." - "Madison and Witherspoon: Theological Roots of American Political Thought," by A.D. Wainwright, pg. 125 

"Christ's divinity appears by St. John, Chapter 20:2: 'And Thomas answered and said unto Him, my Lord and my God!'  Resurrection testified to and witnessed by the Apostles, Acts 9:33: 'And with great power gave the apostles witness of the resurrection of the Lord Jesus, and great grace was upon them all.'" -  "Biography of James Madison," by William C. Rives, pg. 33-34.