which clause of the constitution affirms that the federal government, in exercising any of the powers enumerated in the constitution, must previal over any conflicting or inconsistent state exercise of power

Clause of supremacy

Explanation:

The Clause of supremacy institute 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. For instance, if a federal law in a constitution has already stated a particular way of addressing an issue, the state law can not change the rules even thought the said matter is happening in that particular state.