The first constitution of the United States was "The Articles of Confederation and Perpetual Union" which was endorsed by the Continental Congress around 1777; this was an agreement between the 13 original states of the United States of America, and it's the first governing document.
The Framers of the Constitution were 55 visionaries appointed as delegates and founded the principles to guide and support the nation onward.
The Commerce Clause gave congress power to regulate commerce: with foreign nations, with native tribes and with between the states; and had been allowed by "The Articles of Confederation".