Court rules Elon Musk's tweet on Tesla union campaign illegal.
A US appeals court has ruled that Elon Musk violated federal labour law by tweeting that employees of Tesla would lose stock options if they joined a union. The court upheld a decision by the US National Labor Relations Board that said the 2018 tweet amounted to an unlawful threat that could discourage unionising and ordered Musk to delete it. Tesla had argued that the tweet about unionising was not a threat and merely reflected the fact that union workers at other auto companies did not receive stock options.