Can polls 6 months out tell us who will win the federal election?

[rwana]

http://i.cbc.ca/1.2422129.1384168475!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_460/trudeau-harper-comp-852.jpg History suggests polls do have some predictive power this far out from the vote - and those patterns are not good news for Liberal Leader Justin Trudeau. Polls analyst Eric Grenier explains.


more .... (http://www.cbc.ca/news/politics/federal-election-2015-can-polls-6-months-out-tell-us-who-will-win-1.3037563?cmp=rss)