https://www.siliconvalley.com/2021/03/26/tesla-and-ceo-elon-musk-punished-by-feds-over-anti-union-actions-at-fremont-plant/

Tesla broke labor law that protects union organizing, and CEO Elon Musk must delete an “unlawful” 2018 tweet that “coercively threatened” workers with loss of stock options if they unionized, an order this week from the National Labor Relations Board said.

The decision from the federal workplace regulator came down Thursday. As of noon Friday, Musk’s tweet — “Nothing stopping Tesla team at our car plant from voting union. Could do so tmrw if they wanted. But why pay union dues & give up stock options for nothing?” — remained live.