OTTAWA - The Bloc Quebecois has a similar relationship to the Canadian body politic as the eponymous Alien had with the crew of the starship Nostromo -- that is, it would like nothing better than to burst through the chest cavity of its parliamentary host. Since the party's raison d'etre is to break up the country, its leaders are required to keep their distance from other parliamentarians and be dispassionate about all issues that don't touch on Quebec. Gilles Duceppe has been the model for all future separatist leaders. Never one to fraternize with anglos -- the Bloc prints all...