Federal Permission Isn't a Safe Harbor: The State-by-State Felony Trap in American Gun Laws

In June 2022, a Florida man with a valid concealed carry permit was arrested in New York City and charged with felony possession of a firearm. He had complied with every federal gun law on the books. His Florida license was current. None of that mattered, because New York does not recognize out-of-state carry permits, and under New York law his actions constituted a felony carrying up to fifteen years in prison. The case exposes a structural feature of American federalism that most citizens misunderstand. The common assumption runs something like this: if federal law permits an act—or simply declines to criminalize it—then no state can punish you for it. The Supremacy Clause of Article VI seems to promise exactly that. Federal law is “the supreme Law of the Land,” and state judges are bound by it regardless of what their own state’s statutes say. But the Supremacy Clause only resolves conflicts between federal and state law. It does not eliminate the vast zone where federal law is silent and states choose to legislate on their own. That zone is where concurrent jurisdiction lives. Congress can regulate firearms under the Commerce Clause, and it has—background checks, restrictions on certain weapons, federal licensing for dealers. What Congress has not done is occupy the entire field of firearms regulation. It has left ample space for states to impose additional requirements, higher age limits, stricter permitting regimes, or outright bans on conduct that federal law leaves untouched. When a state does so, it is not contradicting federal law. It is supplementing it. And supplementing is not preempted. The Florida man’s predicament turns precisely on this distinction. Federal law sets a floor for firearm possession—prohibited persons, interstate transport rules, dealer licensing. It does not set a ceiling. States remain free to build upward from that floor, and New York has built one of the highest ceilings in the country. Federal permission is not a safe harbor; it is merely the absence of a federal prohibition. The state you stand on retains its own criminal code, its own enforcement apparatus, and its own view of what public safety requires. The Supreme Court has repeatedly declined to treat the right to travel as a right to carry one’s home-state legal permissions across state lines. Saenz v. Roe (1999) affirmed that citizens have a fundamental right to move freely between states and to be treated equally once they arrive. But the Court drew no inference that traveling with a firearm—or any other regulated item—entitles the traveler to ignore the destination state’s laws. A driver’s license works reciprocally across state lines because states have agreed, through compacts and uniform codes, to make it work. Concealed carry permits enjoy no such reciprocity framework. Some states have bilateral agreements; many do not. The gap is not a glitch in the system. It is the system working as designed. That design creates a genuine dilemma. On one hand, the constitutional structure preserves state autonomy to experiment with different regulatory approaches, to reflect local conditions and local political judgments. A dense urban center like New York City faces different public safety calculations than rural Florida, and federalism allows both to govern accordingly. On the other hand, that autonomy imposes a heavy cognitive burden on ordinary citizens, who are expected to know—or to research before crossing a border—which everyday objects or permissions become criminal liabilities the moment they enter a different jurisdiction. The Florida man probably thought he was a law-abiding gun owner. In Florida, he was. In New York, he was a felony defendant. The governing rule is straightforward once you abandon the assumption that federal law protects you: your rights change at the state line, and ignorance of that fact is no defense. The Constitution sets a baseline. States decide how much higher they want to go—and they do not have to post a warning when you cross into their territory.