JTA — Canada’s main progressive party aims to make a comeback under its new leader Avi Lewis, a Jewish anti-Zionist.

Lewis, a filmmaker and former journalist, was elected to lead the New Democrats on Sunday. He campaigned on principles that have energized the global left, including affordability, the environment and unapologetic anti-Zionism. He repeated his position on Israel in his acceptance speech in Winnipeg.

“When Israel commits a genocide in Gaza, we call it by its name, and we do everything in our power to bring it to an end,” Lewis said in his speech, levying an accusation that Jerusalem harshly denies.

Lewis hopes to rebuild a party that suffered its worst losses in history during the 2025 federal election. Center-left voters who were alarmed by US President Donald Trump’s threats to Canada flocked to the Liberal Party and elected Mark Carney as prime minister.

Lewis comes from a line of progressive royalty. His grandfather, David Lewis, was one of the founding members of the New Democrats and its leader in the 1970s. His father, Stephen Lewis, led the party in Ontario. He is also the great-grandson of Moishe Lewis, who was an outspoken member of the socialist Jewish Labour Bund in Eastern Europe and immigrated to Canada in 1921.

Lewis is married to Naomi Klein, a prominent author and critic of Israel. Klein was among several writers who refused to participate in PEN America’s annual World Voices festival in 2024, saying the group failed to “stand firmly” with Palestinian writers. She also addressed protesters during a rally outside US Senate Majority Leader Chuck Schumer’s residence in Brooklyn during Passover that year, called “Seder in the Streets to Stop Arming Israel,” and urged Jews against worshipping the “false idol” of Zionism.

Lewis was formerly a reporter for the Canadian Broadcasting Corporation and Al Jazeera. In a debate with other candidates in January, he described himself as an “anti-Zionist Jewish person” seeking to “unlearn and unpack the Zionist myths that most Canadian Jews were brought up with.”

The Centre for Israel and Jewish Affairs, an advocacy arm of the Jewish Federations of Canada, said it acknowledged Lewis’s victory “with a deep sense of sadness.”

“Avi Lewis is himself Jewish, and we respect his family’s history in this party,” the group said in a statement. “But Jewish identity is not a shield against accountability. When a leader declares that Zionism is inseparable from ethnic cleansing, he is not engaging in legitimate policy critique. He is telling Jewish Canadians that a core part of their identity is illegitimate.”

On the eve of the New Democratic Party’s leadership convention, CIJA joined dozens of rabbis from across the country in an open letter criticizing the party.

“Too often, the NDP’s response to antisemitism in Canada has been inconsistent, hesitant, or clouded by rhetoric that fails to recognize how hatred manifests in today’s environment,” said the letter.

Perhaps anticipating Lewis’s victory, they added, “Even more troubling is the repeated elevation of fringe or non-representative Jewish voices to deflect, dilute, or dismiss the legitimate concerns of the vast majority of the Canadian Jewish community.”

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