The United Auto Workers were in negotiations with the Volkswagen unit back in Chattanooga, Tennessee. Originally it had intended for the company to negotiate a contract with a group of skilled trade workers, however, they have moved to withdraw the case. Prior to reaching its current state, the UAW representative had accused the automaker of illegally refusing to bargain with a unit of about 160 workers who voted to join the union in 2015.
See "UAW gives up smaller VW unit as it moves to unionize Tennessee plant", Daniel Wiessner, Reuters, April 16, 2019