With his degree from Regent University School of Law — currently ranked 142nd in the nation by U.S. News & World Report — and his claim of being a “constitutional attorney,” you’d think Dan Cox, the Trump-endorsed candidate for Maryland governor, would know about the supremacy clause. And I don’t mean “white supremacy clause” — just “supremacy clause,” as in Article VI of the U.S. Constitution. It says the Constitution and constitutional laws that flow from it “shall be the supreme law of the land.” In other words, federal law trumps state law.