Socialist Unity Party of Germany
Between the fall of the Berlin Wall in November 1989 and the election in March 1990, the old Social Democratic Party was re-established as a separate party, while the rest of the SED lost a lot of members and renamed itself the Party of Democratic Socialism (PDS) at a special party meeting in December 1989. By becoming the PDS the party survived the reuniting of East Germany and West Germany, and eventually started growing again, managing to get representatives elected to the Bundestag.