 In "United States vs. Barton" (2011), Hardiman rejected a challenge to the federal law that bans felons from owning firearms.However, in "Binderup v. Attorney General" (2016), he held that such a prohibition could cover only dangerous persons who are likely to use firearms for illicit purposes.He wrote "the most cogent principle that can be drawn from traditional limitations on the right to keep and bear arms is that dangerous persons likely to use firearms for illicit purposes were not understood to be protected by the Second Amendment."