Attorney General Eric Holder used his testimony before a House committee on Thursday to tout the supposed need for new gun control laws to prevent “gun walking,” or the transportation of firearms across the Southern border. But he – and members of the committee – ignored existing laws that already accomplish Holder’s ostensible goals. “That is why we need a stronger gun trafficking law,” Holder said in response to questions about recourse against officials who signed off on the gun walking tactic. The tactic was integral to Operation Fast and Furious, which allowed the transportation of roughly 2,500 firearms into...