The liberal campaign against the NRA has successfully pressured some companies to sever their partnerships with the gun rights group but it’s having another, unintended effect: galvanizing conservatives who feel the NRA has been unfairly attacked. Liberal activist groups turned the NRA into a scapegoat for the Florida school shooting that left 17 people dead and immediately launched a pressure campaign meant to weaken the NRA, which touts itself as the nation’s longest-standing civil rights organization. Liberals have threatened boycott campaigns against companies like FedEx, for having discount partnerships with NRA members. On that front, the activists have had some...