Election gains of Nazi Party candidates in municipal, state and national elections in 1930 and 1932 were significant. Adenauer, as mayor of Cologne and president of the Prussian State Council, still believed that improvements in the national economy would make his strategy work: ignore the Nazis and concentrate on the Communist threat. Adenauer thought the Nazis should be part of the Prussian and "Reich" governments based on election returns, even when he was already the target of intense personal attacks. Political manoeuvrings around the aging President Hindenburg then brought the Nazis to power on 30 January 1933.