Canada's Prime Minister Mark Carney speaks during a visit to the Ambassador Bridge linking Ontario with Michigan, as part of his Liberal Party election campaign tour, in Windsor, Ontario, Canada March 26, 2025.

Homing in once again on the fractured Canada-U.S. relationship, Liberal Leader Mark Carney unveiled a $2-billion proposal to protect Canada's auto industry while in Windsor, Ont., on Wednesday — one of the front lines of the tariff war.