Answer:
Supremacy clause
Step-by-step explanation:
The supremacy clause was written in the (Article VI, Clause 2) of the united states constitution. In case of contradictions between the states and federal law, the federal law will always overruled the state law.
For example,
Let's say that the Federal law imposed a minimum wage of $15/hour nationwide. But the state of Florida imposed a minimum wage of $12/hour. In that case, the state of Florida could be sued since the law that it Creates contradicts the Federal law and considered as unconstitutional. People in Florida has the right to be paid a minimum of $15/hour.