fourth in the 2020 leadership election Jeff Lehman, Mayor of Barrie, Ontario (2010–2022) Bill Mauro, Mayor of Thunder Bay (2018–2022), MPP for Thunder Bay—Atikokan (2003–2018), Minister of Municipal Affairs and Housing (2016–2018), Minister of Natural Resources and Forestry (2014–2016), Minister of Municipal Affairs (2014) Mike Schreiner, leader of the Green Party of Ontario (2009–present), MPP for Guelph (2018–present) Opinion polling Liberal supporters References Ontario Liberal Party leadership elections Future elections in Canada