In case you wanted to know how the Liberals are going to paint our new leader...
http://warrenkinsella.com/wp-content/uploads/2012/03/20120324-233936.jpg
Remember who your enemies are. Don't give them an inch.
While Nathan Cullen presented an interesting idea to support electoral cooperation between the NDP and Liberals, and Warren Kinsella seemed to support this idea, I think Mr. Kinsella wanted Nathan Cullen to win because he knows that this idea wouldn't work in practice. Essentially, it takes two to tango. The next Liberal leader (Bob Rae or someone else) could reject cooperation. This move would neuter Mr. Cullen and the NDP, and raise the Liberal Party's profile.
Warren Kinsella is upset that Thomas Mulcair won because Mr. Mulcair will highly likely raise the profile of the NDP if things go well. Thomas Mulcair is definitely a fighter. The Liberals will need a strong leader to fight a two-front war in the next federal election.