From the Library of Congress web page:
"The Continental-Confederation Congress, a legislative body that governed the United States from 1774 to 1789, contained an extraordinary number of deeply religious men. The amount of energy that Congress invested in encouraging the practice of religion in the new nation exceeded that expended by any subsequent American national government. Although the Articles of Confederation did not officially authorize Congress to concern itself with religion, the citizenry did not object to such activities. This lack of objection suggests that both the legislators and the public considered it appropriate for the national government to promote a nondenominational, nonpolemical Christianity."
Also from the LOC Web page:
"On July 4, 1776, Congress appointed Benjamin Franklin, Thomas Jefferson and John Adams "to bring in a device for a seal for the United States of America." Franklin's proposal adapted the biblical story of the parting of the Red Sea (left). Jefferson first recommended the "Children of Israel in the Wilderness, led by a Cloud by Day, and a Pillar of Fire by night. . . ." He then embraced Franklin's proposal and rewrote it (right). Jefferson's revision of Franklin's proposal was presented by the committee to Congress on August 20. Although not accepted these drafts reveal the religious temper of the Revolutionary period. Franklin and Jefferson were among the most theologically liberal of the Founders, yet they used biblical imagery for this important task."
And also from LOC:
"The war with Britain cut off the supply of Bibles to the United States with the result that on Sept. 11, 1777, Congress instructed its Committee of Commerce to import 20,000 Bibles from "Scotland, Holland or elsewhere." On January 21, 1781, Philadelphia printer Robert Aitken (1734-1802) petitioned Congress to officially sanction a publication of the Old and New Testament which he was preparing at his own expense. Congress "highly approve the pious and laudable undertaking of Mr. Aitken, as subservient to the interest of religion . . . in this country, and . . . they recommend this edition of the bible to the inhabitants of the United States." This resolution was a result of Aitken's successful accomplishment of his project."
And also from the LOC Web page:
In the summer of 1787 Congress revisited the issue of religion in the new western territories and passed, July 13, 1787, the famous Northwest Ordinance. Article 3 of the Ordinance contained the following language: "Religion, Morality and knowledge being necessary to good government and the happiness of mankind, Schools and the means of education shall be forever encouraged." Scholars have been puzzled that, having declared religion and morality indispensable to good government, Congress did not, like some of the state governments that had written similar declarations into their constitutions, give financial assistance to the churches in the West."
And from another LOC Web page on the Faith of the Founding Fathers:
"Benjamin Franklin delivered this famous speech, asking that the Convention begin each day's session with prayers, at a particularly contentious period, when it appeared that the Convention might break up over its failure to resolve the dispute between the large and small states over representation in the new government. The eighty one year old Franklin asserted that "the longer I live, the more convincing proofs I see of this Truth--that God governs in the Affairs of Men." "I also believe," Franklin continued, that "without his concurring Aid, we shall succeed in this political Building no better than the Builders of Babel."
Apparently David Barton is correct!