The four candidates vying to seize the reins of Ontario's Opposition each painted themselves as the only one equipped to clean up the mess left by former leader Patrick Brown as well as take on Liberal Premier Kathleen Wynne in the province's spring election.

The disgraced former leader is determined not just to defend himself, but expose those he claims have done him wrong — and in doing so, he threatens to take the entire party down with him.

The candidates vying to lead the Ontario Progressive Conservative party will square off today in an hour-long debate in Toronto.