Open this photo in gallery: Canada Post vehicles are parked in northwest Calgary, on Jan. 21.Amir Salehi/The Globe and Mail The Liberal Party plans to rely heavily on Canada Post to confirm the voters’ identities in the leadership race to replace Prime Minister Justin Trudeau. Before being allowed to cast a ballot, registered Liberals will have to verify their identity. Newly published rules say this can be done either through an in-person visit to a participating Canada Post Office or by using Canada Post’s Identity+ mobile app. The app scans ID documents such as a passport or driver’s licence and...