I've mentioned in this blog before that groups in Houston, San Francisco, and Minneapolis-St. Paul have looked at finding ways to get the United States back into the BIE so that cities can bid for Expo 2022, Expo 2023, or Expo 2025, but parallel efforts are also under way in Canada.
After Edmonton's bid efforts for 2017 were killed off by Canada's federal government, interests in Toronto, headed by City Councillor Kristyn Wong-Tam, started looking at Expo 2025. Last year, those efforts seemed to have been killed by the Canadian federal government's decision to discontinue its membership in the BIE, but this month, it looks like there's a renewed push for Expo 2025 and an effort to keep Canada in the BIE.
Toronto had previously competed to host Expo 2000, but lost to Hannover, Germany. Plans for a Toronto bid for Expo 2015 dematerialized due to disagreements over funding between city, provincial, and national officials.