POLAND'S PRESIDENTIAL election divided the country into two camps with roughly equal numbers of supporters. President-elect Aleksander Kwasniewski, who ultimately won the slightly larger share of the electorate, had stressed the theme of unity, promising to overcome the old divisions. The unseated Lech Walesa, notoriously combative and more divisive than his youthful rival, pledged to build a new political movement and to fight the left, especially Kwasniewski.