for having, in a magazine interview, made a comparison between the propaganda skills of Mikhail S. Gorbachev and Joseph Goebbels, Schäuble was reported to have counseled the Chancellor against writing Gorbachev an apology for the remark, saying it would be misunderstood as a sign of weakness. In his capacity as Minister for Special Affairs, Schäuble was put in charge of the preparations for the first official state visit of Erich Honecker, Chairman of the State Council of the German Democratic Republic (GDR), in 1987. By that time, he was widely considered to be one of Kohl's closest advisers. Federal Minister of the Interior, 1989–1991 In a cabinet reshuffle Schäuble was made Minister of the Interior on 21 April 1989. In this role he also led the negotiations on behalf of the Federal Republic of Germany for reunification with the GDR in 1990. He and East German State Secretary Günther Krause signed the Unification Treaty on 31 August 1990. In a speech to parliament in 1991, Schäuble clinched the argument in favour of moving the German capital from Bonn to Berlin. In the 1990s Schäuble was one of the most popular politicians in Germany and there was constant speculation that he would replace Kohl as Chancellor, whose popularity was declining. In November 1991, Schäuble became the Christian Democrats' parliamentary floor leader, replacing 71-year-old Alfred Dregger, in a move that made him Kohl's likely heir-apparent. In 1997 Helmut Kohl stated that Schäuble was his desired candidate to succeed him, but he did not want to hand over power until 2002 when the European monetary union would be completed with the introduction of the euro. However, as the CDU/CSU lost the 1998 election, Schäuble never became Chancellor. After Eberhard Diepgen was voted out as mayor of Berlin, Schäuble was in talks to be the top candidate for the early election on 21 October 2001, but was rejected by the Berlin branch of the CDU in favour of Frank Steffel. Some quarters of the CDU and CSU wanted to put Schäuble forward as their candidate for the office of German President, the largely ceremonial head of state, at the beginning of March 2004, due to his extensive political experience. In spite of support from the Premiers of Bavaria (Edmund Stoiber (CSU)) and Hesse (Roland Koch (CDU)), Schäuble did not receive the party's nomination in the end because CDU leader Angela Merkel, other CDU politicians