US Constitution Article III
A bit more context... Trader Joe's is owned by the same "family wealth office"/trust that also owns Germany's Aldi Nord, who have been accused of union busting [1] both in the recent past as well as years prior [2]. Aldi Süd, owned by a different branch of the Albrecht family, had a unionization meeting two years ago escalated so far that police had to be called [3].
It is absolutely zero surprise for me that this kind of behavior passed onto the USA. Can't accrue billions of wealth after all when unions annoy you.
[1] https://handel.verdi.de/unternehmen/a-c/aldi/++co++8efa185a-...
[2] https://www.merkur.de/wirtschaft/verdi-wirft-aldi-nord-beste...
[3] https://arbeitsunrecht.de/aldi-sued-betriebsratsgruendung-en...