As much as minority governments are typically fragile and short-lived, I think the Liberals can manage this fairly well if they don't make major mistakes. The Bloc, the NDP and the Greens are all more progressive than the Liberals, so the Liberals should be able to get support for any of their more progressive bills from these parties, and to hell with what the Conservatives think; for progressive issues, the Liberals can govern like they have a majority. As for issues like pipelines, the Liberals can look for support from the Conservatives - I can't imagine the Conservatives voting against the pipelines they want so desperately - and to hell with what the Greens, the NDP and the Bloc think. So again, the Liberals can govern like they have a majority on issues where they can get support from the Conservatives. The only constraint for the Liberals will be surrounding issues where they don't overlap significantly with the progressive parties or the Conservatives, and I can't even think of one of these issues right now. But they probably exist, and the Liberals will have to just leave those on the back burner until they can regain a majority.