I’ll keep this one simple: “This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the Contrary notwithstanding.” – Article VI, Clause 2
This part means that NOTHING, regardless of its source, INCLUDING SHARIA LAW, will EVER have any lawful superiority over the U.S. Constitution.
Furthermore, American Muslims speak out against the enforcement of shari‘ah law in America:
Like many Americans, members of the American Islamic Leadership Coalition (AILC) have been observing the efforts of a growing number of state legislatures, which are seeking to address the incompatibility of various shari‘ah court systems around the world with the principles and foundations of our Constitutional republic and its laws. As American Muslims, we believe that the law should treat people of all faiths equally, while protecting Muslims and non-Muslims alike from extremist attempts to use the legal instrument of shari‘ah (also known as Islamic jurisprudence, or fiqh) to incubate, within the West, a highly politicized and dangerous understanding of Islam that is generally known as “Islamism,” or “radical Islam.” – Source
It is up to We the People, however, to KEEP it that way. If we fail, WE ALL fail. Our country fails, destined to fall away just the same as so many hundreds of countries have failed before for precisely the same reasons.
Fortunately, we Americans have a sixth column, one woven throughout the fabric of leadership in our society:
“The Senators and Representatives before mentioned, and the Members of the several State Legislatures, and all executive and judicial Officers, both of the United States and of the several States, shall be bound by Oath or Affirmation, to support this Constitution; but no religious Test shall ever be required as a Qualification to any Office or public Trust under the United States.”
This section, along with the President’s own Article II Section 1 oath of office, forms the basis of Constitutional constancy: “I do solemnly swear (or affirm) that I will faithfully execute the Office of President of the United States, and will to the best of my Ability, preserve, protect and defend the Constitution of the United States.”
U.S. oaths of office aren’t limited to members of the federal government. In fact, EVERY civil, military, and law enforcement officer takes the SAME oath of office, as per 5 U.S. Code § 3331 – Oath of office:
“An individual, except the President, elected or appointed to an office of honor or profit in the civil service or uniformed services, shall take the following oath: “I, AB, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter. So help me God.””
This link contains a number of excellent comparisons that demonstrate the irreconcilable differences between the Constitutional Law and Sharia “law.”