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Prior to Christian Wulff's presidency, Germany was led by Horst Köhler. Köhler served as the ninth president from 2004 to 2010. His presidency faced challenges such as the global financial crisis and Germany's integration of immigrants. In May 2010, Köhler resigned from the office due to controversies surrounding his remarks on Germany's military involvement in Afghanistan. Wulff was subsequently elected as his successor in June 2010.