Tim Hudak isn't backing down from his right-to-work proposal.
It would make union membership optional for workers.
The Progressive Conservative leader has come under fire for the idea, with some members of Hudak's own party questioning it.
The Liberals says some Tory MPPs voted against legislation 17 years ago. They also pointed to MPP John O'Toole and Niagara Falls candidate Bart Maves questioning the proposal. The party turfed Essex candidate Dave Brister after he spoke out against the idea.
Hudak says there needs to be labour reform so manufacturing jobs aren't lost to the U.S.