Huh? How many of the Ten Commandments are articulated in the US Constitution? (Answer: none). Next question: how many of the Ten Commandments are commonly codified in state and federal statutory law? Answer: two and a half (depending on how you count.
If it is "the very basis" for the Constitution, the Framers hid it pretty damn well.
Where do you suppose the Framers got their ideas of individual liberty, equal justice, and personal accountability from, andy_card? Or the idea that men must not perform certain types of offenses against other men, in order for there to be a just, stable society? That justice and goodness have a Source and standard that is greater than mere government -- that even government derives its just powers from a Source beyond itself? That there is such a thing as human rights that are unalienable precisely because they derive from and conform with man's God-created dignity that no just government may infringe?
Do you suppose the Framers just suddenly started spontaneously hatching bright ideas one fine day, out of "whole cloth?" That they just decided to sit around hallucinating together, and that's how they wrote our foundational document -- on a "blank slate" -- in a brainstorming session that never at any point referenced their culture and history?
Or do you suppose that their education and culture might have had something to do with the way these men thought -- and designed?
An elephant is easily hidden from a blind man.