Nullification isn’t specifically listed in the Constitution. But that doesn’t mean you can’t do it. Every once in awhile, someone tells us, “The Constitution doesn’t say anything about nullification. That means states simply can’t do it.” But they’ve got things totally backwards. It’s true that the federal government has limited powers and is only authorized to do the things delegated to it in the Constitution. As James Madison put it in Federalist #45, “the powers delegated by the proposed constitution to the federal government are few and defined.” If a power isn’t delegated, the federal government simply is not authorized to do it. On the other hand, states have reserved powers. As Madison put it, “Those [powers] which are to remain in the State governments are numerous and indefinite.” Of course, states don’t have unlimited power either. Their individual constitutions limit what they can and cannot do. But when it comes to the U.S. Constitution there are very few limits on state authority. So, what does the Constitution prohibit the states from doing? Well, you can find most of those restrictions in Article 1 Section 10. Along with these, there are a few others scattered throughout the document. You’ll notice it’s not a very long list. And it does not include nullification.