So far,both major parties say they are not willing to enter a coalition with the Left Party. The Greens and the pro-business FDP have been courted by both the CDU and SPD as potential coalition partners.In Germany's five-party system,neither of the main parties can hope to enter government without forming a coalition with one of the smaller parties. But on many occasions those smaller parties appear to block their own progress by refusing right from the start to work with certain other parties.