Technically speaking federal law must be pursuant to the constitution in order to trump State Law. It's in the document. But, what a court or radical judge may decide is another matter.
"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, anything in the constitution or laws of any state to the contrary notwithstanding."
"...to the contrary notwithstanding" refers back to judges---notice semi-colon after "land;"
