Indeed this will be the underlying question that will follow Michael ignatieff and the Liberals through a long 36 day campaign.
From National Post
The Liberals and NDP must pledge to Canadians that the Bloc Québécois will not be included, as either partner or prop, in any coalition government. If they do not, then Stephen Harper’s Tories will be entirely within their rights to relentlessly remind voters that a vote for any federalist opposition party — Liberals, NDP or even the Greens — might effectively become a vote for a coalition that includes politicians dedicated to Canada’s destruction.
