Brad, a citizen of California, obtains a federal license to operate a commercial fishing boat in a certain area off the coast. The California state legislature enacts a law that bans all commercial fishing in that area. The state law most likely violates

the supremacy clause

Explanation:

The Supremacy Clause of the Constitution of the US, mentions that the Constitution, government laws made according to it, and settlements made under its position, establish the "supreme Law of the Land", and in this way take need over any clashing state laws. So, in this case, the state law of California violates this clause as Brad had previously obtained his federal license.

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