There is no such thing. President Jefferson coined the phrase "separation of church and state" but there is no law that says such a thing. The phrase is based upon the first amendment to the constitution and what is referred to as the establishment clause which forbids the establishment of a state religion (such as England once had) and is supposed to guarantee our right to worship as we see fit. Unfortunately, some supreme court justice redefined the constitution as a "living" document the meaning of which changes to accommodate the times, and liberal justices have supported a "law" which doesn't exist except in the minds of a grossly ignorant (but willful) population.
One of the things that the founding fathers may have been concerned with and we should be as well is:
And he was given a mouth speaking great things and blasphemies, and he was given authority to continue for forty-two months. Then he opened his mouth in blasphemy against God, to blaspheme His name, His tabernacle, and those who dwell in heaven. And it was granted to him to make war with the saints and to overcome them. And authority was given him over every tribe, tongue, and nation. And all who dwell on the earth will worship him, whose names have not been written in the Book of Life of the Lamb slain from the foundation of the world. If anyone has an ear, let him hear.
Revelation 13:5-9 and:
He was granted power to give breath to the image of the beast, that the image of the beast should both speak and cause as many as would not worship the image of the beast to be killed. Revelation 13:15
King Nebuchadnezzar of Babylon once attempted to do something like this (Daniel chapter 3), but of course Nebuchadnezzar lived more than 400 years before the last book was written. Such behavior isn't uncommon among Imperial monarchies. For example, prior to WWII the emperor of Japan was treated as a divine being and it was required that one bow down before him when approached. However, there haven't been many men who could've been called rulers of the entire world and in the past those that were called such were rulers of the known world and not of the entire earth. Perhaps this is the first time in history when it would actually be possible to rule the entire earth if invested with sufficient political power (In the past world wide public communications and nearly instantaneous translation didn't exist: We've already built what qualifies as a virtual Babylon and there are certainly quite a few computer scientists already working on an omniscient artificial intelligence.)
And the Lord said, "Indeed the people are one and they all have one language, and this is what they begin to do; now nothing that they propose to do will be withheld from them. Genesis 11:6
Therefore the Lord said: "Inasmuch as these people draw near to Me with their mouths and honor Me with their lips, but have removed their hearts far from Me, and their fear toward Me is taught by the commandment of men, Therefore, behold, I will again do a marvelous work among this people, a marvelous work and a wonder; for the wisdom of their wise men shall perish, and the understanding of their prudent men shall be hidden.'' Isaiah 29:13-14