For decades, the most prominent American unions were largely supportive of Israel. Today, though, amid a resurgence of the American labor movement, some activists are urging their unions to call for an immediate cease-fire in Gaza and succeeding — a change that reflects a broader generational shift.

But many unions are divided over what stance to take or whether to take any stance at all.

Some American labor leaders have remained supportive of Israel’s war against Hamas, and moved swiftly to condemn Hamas’s attacks on Oct. 7. They are dismayed by the views of a younger generation of organizers who in some cases oppose Israel’s existence as a Jewish state.

“There has been a shift in society, and that’s reflected in the labor movement as it is every place else,” said Stuart Appelbaum, president of the Jewish Labor Committee and head of the Retail, Wholesale and Department Store Union.

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