As Canada prepares to legalize marijuana this summer, politicians are facing growing calls to grant a blanket amnesty for people convicted under the existing drug laws – many of whom belong to marginalized groups. Since the prime minister, Justin Trudeau, was elected in 2015 on a manifesto promise to legalize cannabis, more than 15,000 people have been charged over marijuana-related offences – joining close to 500,000 Canadians with marijuana convictions on their criminal record. The Campaign for Cannabis Amnesty launched a petition asking the government to consider pardons for possession charges. The group hopes to gain at least 5,000 signatures by the end of May.