A key former ally of Justin Trudeau’s said he would vote to topple the government, a move that would likely plunge the country into an election early next year unless the prime minister seeks a temporary suspension of parliament.

Trudeau’s Liberal Party does not have a majority in the House, and until now it has been relying on NDP votes to pass legislation and keep the government going. Singh and Trudeau had a formal agreement to cooperate, which they struck in March 2022. But the NDP leader withdrew from that deal in September.