The Supremacy Clause of the Constitution of the United States (Article VI, Clause 2), establishes that the Constitution, federal laws made pursuant to it, and treaties made under its authority, constitute the "supreme Law of the Land", and thus take priority over

any conflicting state laws -
to form a more perfect Union, establish Justice, ensure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity -
10 U.S. Code § 252 - Use of militia and

To promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity -
10 U.S. Code § 252 - Use of militia and armed forces to enforce Federal authority https://www.law.cornell.edu/uscode/text/10/252