If there's one theme dominating this election campaign, it's summed up by that rather vague term "defending national interests". Amid a new row over the post-war expulsion of Czechoslovakia's ethnic Germans, all the parties are trying to prove that they're better at "defending national interests" than anyone else. All three major parties - all except the Communists - have tramped up and down a hill called Rip, a hill deeply connected with Czech mythology, to either launch, or breathe life into lacklustre election campaigns. Those politicians