Canadian federal election - 2015

[Mr. Morden]

I haven't been following Canadian politics recently, so can I ask a dumb question?: With recent polling, it looks like it's conceivable that the Conservatives will once again win a plurality of seats (but not a majority this time).  In such a scenario, is it a given that they'll once again form a minority government?  Or is there any chance of the NDP propping up the Liberals or joining them in a coalition?

[Mr. Morden]

I asked a version of this question back when the Liberals were the ones competing for the polling lead: If the Conservatives get a plurality of seats, but NDP+Liberal is a majority, is there any chance that the Liberals will prop up an NDP minority government, or are the Liberals bound to let whoever gets a plurality of seats form the government?