In Brief

Ontario Liberal Leader Bonnie Crombie will resign after failing to secure enough support from her party’s caucus, leaving the leadership in flux.

Key Points

  • Bonnie Crombie to resign as Ontario Liberal Leader next month
  • Decision follows lack of support from party caucus
  • Crombie says she cannot unite the party under her leadership
  • She will continue serving as Mayor of Mississauga

Toronto — September 15, 2025 — Ontario Liberal Leader Bonnie Crombie has announced she will resign from her post after receiving insufficient support from the party’s caucus, plunging the Liberals back into a period of uncertainty just months after her election to the leadership.

Crombie, who also serves as Mayor of Mississauga, was elected as leader less than a year ago in a bid to revive the Ontario Liberals ahead of the next provincial election. But her leadership faced mounting challenges, with several caucus members voicing doubts about her ability to unify the party.

“After careful consideration, I have decided to step down as leader of the Ontario Liberal Party,” Crombie said in a statement on Monday. “It has become clear that I am unable to unite our party in the way it needs to be united.”

Party insiders had grown increasingly vocal about Crombie’s strategy and leadership approach, particularly after internal polling showed limited progress in rebuilding voter confidence. The lack of strong caucus backing ultimately pushed Crombie to resign.

Despite her departure from the party leadership, Crombie confirmed she will continue serving as Mayor of Mississauga, a role she has held since 2014.

Political analysts note that Crombie’s exit leaves the Ontario Liberals scrambling once again for a leader, with the party already struggling to define itself in opposition to Premier Doug Ford’s Progressive Conservatives. This marks the second leadership vacancy in under two years, raising questions about the party’s stability and readiness for the next election.

The Ontario Liberal Party has yet to announce the process for selecting an interim leader or the timeline for a new leadership contest.

Toronto — September 15, 2025 — Ontario Liberal Leader Bonnie Crombie has announced she will resign from her post after receiving insufficient support from the party’s caucus, plunging the Liberals back into a period of uncertainty just months after her election to the leadership.

Crombie, who also serves as Mayor of Mississauga, was elected as leader less than a year ago in a bid to revive the Ontario Liberals ahead of the next provincial election. But her leadership faced mounting challenges, with several caucus members voicing doubts about her ability to unify the party.

“After careful consideration, I have decided to step down as leader of the Ontario Liberal Party,” Crombie said in a statement on Monday. “It has become clear that I am unable to unite our party in the way it needs to be united.”

Party insiders had grown increasingly vocal about Crombie’s strategy and leadership approach, particularly after internal polling showed limited progress in rebuilding voter confidence. The lack of strong caucus backing ultimately pushed Crombie to resign.

Despite her departure from the party leadership, Crombie confirmed she will continue serving as Mayor of Mississauga, a role she has held since 2014.

Political analysts note that Crombie’s exit leaves the Ontario Liberals scrambling once again for a leader, with the party already struggling to define itself in opposition to Premier Doug Ford’s Progressive Conservatives. This marks the second leadership vacancy in under two years, raising questions about the party’s stability and readiness for the next election.

The Ontario Liberal Party has yet to announce the process for selecting an interim leader or the timeline for a new leadership contest.

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