Gun show loophole

We hear from anti-gun groups how the "gun show loophole" allows "unlicensed dealers" to sell guns to criminals without background checks. That, as this case demonstrates, is a bald faced lie:

A Janesville man accused of selling hundreds of firearms, at least one of which was later seized from a felon, was indicted this week in federal court on charges of selling firearms without a license.
Gary Schroeder, 65, sold firearms at gun shows in Janesville, Delavan, Fort Atkinson and other area cities from at least April 2014 to at least January 2017, recording sales exceeding $200,000, according to court documents.