Representatives from the UAW announced earlier today that they filed a complaint with the NLRB after the electric car company Tesla fired roughly 400 employees who reportedly wanted to unionize. The terminated employees included supervisors and assembly line workers, among others according to a former Tesla employee. A representation election will be held in February at Tesla’s Fremont plant.
See "UAW Files Complaint Against Tesla Representing Terminated Workers", New York Times, October 26, 2017