Twenty-five leaders from a broad array of private firms and construction and trades associations recently signed a letter urging the City of Toronto to back the proposed bid.

Then, on May 24, a trio of stakeholders — Mike Yorke, president of the Carpenters' Union Local 27, Andy Manahan, executive director of the Residential and Civil Construction Alliance of Ontario, and Ken Tanenbaum, vice-chair of the Kilmer Group — appeared at a media conference held prior to an executive committee meeting at Toronto City Hall to speak to the matter.

Yorke, Manahan and Tanenbaum were joined by former mayors Art Eggleton and Barbara Hall and ex-premier David Peterson at the event, which was hosted by Toronto city councillor Kristyn Wong-Tam, who has taken a lead role in ramping up support for the bid.

Supporters have identified Toronto's Port Lands as the ideal Expo 2025 site. It includes 880 acres of largely vacant former industrial lands — sections of which are contaminated — currently being master-planned by Waterfront Toronto.