"The brass ring will go either to Harper or to the leader who can unite the majority of Canadians against him. The most leaderly thing Jack Layton can do at this point is to say, "In the event of another minority, we will seek, with any other interested parties, to form a coalition government to prevent Harper from ruining Canada and its international reputation. We hope it is an NDP-led coalition, but whoever leads it, we will insist upon a short list of conditions and expectations," and begin to muse about these conditions.
This bold act would change the whole campaign, making coalition politics the main subject of discussion for its remainder. Sure, it poses risks for the NDP, which has so often been the victim of "strategic voting," which often amounts to Liberal voting. With a forthright and proud NDP taking the initiative, rather than dealing with it defensively, and with Dion's weaknesses, the strategic voting impulse would diminish.
Canadians would see the declaration as a bold and hopeful act for Jack Layton to subsume his own party's natural desire for supremacy before the greater good of getting rid of Harper. In the end, he will be rewarded if he takes this path. "
http://www.straightgoods.ca/ViewFeature8.cfm?REF=471