Garneau called on him to release more detailed policies before members and supporters begin to vote .
Fellow leadership candidate Marc Garneau , seen as Trudeau 's main challenger in the race , criticized Trudeau for not releasing enough substantial policy positions .
leadership candidate called on Trudeau to release more detailed policies before members and supporters begin to vote .
Fellow leadership candidate Marc Garneau , seen as Trudeau 's main challenger in the race , criticized Trudeau for not releasing enough substantial policy positions .