Conservatives greeted most of the speech from the throne with equanimity. To the victor the spoils and David Johnston merely recited a pro forma list of Liberal campaign promises.But when the Governor General mentioned electoral reform, a chill will have run along the Conservative side of the Senate looking for a spine to run down.The government will take actions to ensure the 2015 general election was the last conducted under the first-past-the-post voting system, Johnston said.The repeated commitment to look at the prospect of electoral reform, specifically use of a preferential ballot system, represents an existential threat to the Conservative Party of Canada. It's a sleeper issue that could dramatically change the complexion of politics in this country.Justin Trudeau has made no secret of the fact tha