[VOA]

Was the United States founded on Judeo-Christian principles?

Well, I think conservative Jewish radio show host Dennis Prager has summed it up
pretty well: "America is the only Judeo-Christian country in the history of the world".

And as for a great book (Five Stars of five from nine reviews at amazon.com) on the topic:

On Two Wings: Humble Faith and Common Sense at the American Founding
by Michael Novak

Novak is at The American Enterprise Institute...and I think that he is a
Messianic Jew (a Jew converted to Christianity...talk about having all the tools
for a book on this topic!

[iconoclast]

Novak is at The American Enterprise Institute...and I think that he is a Messianic Jew

I think you may have in mind ROBERT Novak, a Jew converted in the last couple of years. Michael Novak has been Catholic for several years (15-20 at least?), and is a convert. He may have been Jewish too, but I have never heard it.