Professional Air Traffic Controllers union [aka PATCO] was one of the few Unions that supported Ronald Reagan in 1980.
They went on strike after he took office, and he fired them all, and made sure they would never work again. The country was so desperate for controllers that they were hiring people with GEDs to take the training.
Reagan hated Unions, which was funny because he boasted of being a Union President [Screen Actors Guild.] While in that job, he helped the FBI spy on his membership.