Elon Musk is in tweeting purgatory again.
A federal appeals court ruled Friday that the billionaire must delete his 2018 Twitter post suggesting that Tesla Inc. workers could lose stock options if they formed a union, as it violated labor law.
The decision is a victory for the National Labor Relations Board and a blow to Tesla, which has vehemently opposed the United Auto Workers’ years-long effort to unionize the electric-vehicle maker’s workers.