@mpjgregoire @mariellequinton @andrew @johnefrancis the 2015 platform said he supported electoral reform, and did not single out one particular type:
"We are committed to ensuring that 2015 will be the last federal election conducted under the first-past-the-post voting system.
We will convene an all-party Parliamentary committee to review a wide variety of reforms, such as ranked ballots, proportional representation, mandatory voting, and online voting. ..."
https://web.archive.org/web/20151006133851/https://www.liberal.ca/realchange/electoral-reform/