The Canadian province of Alberta has proposed a range of gender policies restricting surgery and hormone treatment for minors – measures criticised by doctors, teachers and rights groups. Canadian Prime Minister Justin Trudeau condemned the proposals as “the most anti-LGBT of anywhere in the country”. But the leader of the opposition Conservative Party nationally, Pierre Poilievre, who has a huge lead over Trudeau in the polls, has backed the Alberta plan. Trudeau’s Liberals accused Poilievre of mimicking U.S. Republican Party rhetoric and seeking to fuel a debate in Canada that has polarised political parties in the United States. Here’s what you need to know.