The House subcommittee on Health, Employment, Labor, and Pensions recently held a hearing on modernizing federal labor law. Here’s an easy first step: Close the “worker center” loophole.

Congress passed the National Labor Relations Act in 1935 and the Labor-Management Reporting and Disclosure Act in 1959 to regulate the often-contentious interactions between employers and employees. The laws set ground rules for organizers and employers to ensure that, as heated as a campaign might get, there was some fairness and order in the process. Workers could strike and picket, for instance, but organizers couldn’t go out and take action to intimidate firms that merely did business with a company targeted for unionization. (Speaking of which, it would be nice if angry Twitter mobs followed the same principle.)