Likely dozens of third parties will spend a cumulative millions of dollars during the campaign. With an election underway, parties are officially on the hunt for the votes of Canadians, criss-crossing the country and campaigning right up to Sept. 20. And to fund all that travel, advertising and election gear, parties will be shelling out a lot of money. But political parties and candidates will not be the only groups spending big in the election campaign. “Third parties” are also in the mix and will be hoping to shape the political conversation, get their issue prioritized and build up or tear down other political actors. Third parties get far less attention than the big political organizations that will eventually send MPs to Ottawa, but they can still play a significant role in influencing debates and campaigns. So what do they do?