Jim Bovard in the Hill on gun control in practice: President Trump declared last week that the law enforcement should “take the guns first, go through due process second.” But the history of federal firearms enforcement shows that due process is often a mirage when federal bureaucrats drop their hammer. Before enacting sweeping new gun prohibitions, we should remember the collateral damage and constitutional absurdities from previous federal crackdowns. Gun control advocates have called for prohibiting possession of AR-15 rifles — a ban that could create five million new felons overnight,...