neither mulcair nor trudeau will reverse the decision if they win.
http://www.cbc.ca/news/politics/northern-gateway-pipeline-approved-with-209-conditions-1.2678285
trudeau's party won't let him.
and, mulcair's party will ultimately push for refineries to create more union jobs, not to shut the project down.
it might put a few more greens in parliament, and they'll be ignored.
we don't live in a democracy. the opposition has just wasted a lot of time playing silly political games that they can never win, rather than build networks that can oppose the construction by force.
and, on that note: only in canada do we look at election results that contradict every poll taken and say "gee, i guess the pollsters got it wrong".
i didn't see one person suggest the election was fixed.
and, look at the way it got spun: "flopping" was a "mistake".