The National Education Association, the nation’s largest teachers’ union, has endorsed a proposal to cut ties with the Anti-Defamation League, a civil rights group focused on combatting antisemitism,

The country’s largest teachers union narrowly passed a resolution this week intended to cut ties with the Anti-Defamation League, escalating tensions between progressive organizations and the Jewish civil rights group that has long been welcomed in liberal spaces.

The National Education Association, the United States’ largest teachers union, has passed a non-binding measure barring the union from using, endorsing or publicizing any materials from the Anti-Defamation League.