I've already posted my thoughts on this issue before and nothing since then has improved the idea. It made sense for the PCs and Reform (or Alliance or whatever) to combine because they had been one party for most of the 20th century. But even after merging they still can't seem to attract much more support than one-third of the population.
There are serious structual and political obstacles to a Liberal-NDP party merge and nothing I have seen, heard or read indicate that they are going away anytime soon. A coalition government is much more likely and is the path of far lesser resistance in unseating the government which holds power today.
