WARSAW -- In Mitteleuropa, the roles have reversed. The boring, steady Germans last Sunday opted for political chaos by failing to elect a government. A week later, the passionate but messy Poles expressed no ambivalence in picking a clean slate of leaders. Polish former communists were chucked out after a single term, keeping alive a losing streak for incumbents dating back to the birth of democratic Poland. The fresh Polish twist is found in the victor's camp. Two conservative parties built a majority around the very ideas that Angela Merkel and her center-right allies failed to sell Germans on. Law...