Leonhardt became involved in politics in 1932 when he joined the National Front, and before long he had risen to the rank of Gauführer (equivalent to Gauleiter) in both Basel-City and the Canton of Solothurn.
Ernst & Young | Max Ernst | Ernst Haeckel | Ernst Mayr | Ernst Jünger | Ernst Zündel | Ernst Gombrich | Ernst Mach | Ernst Ulrich von Weizsäcker | Ernst Moritz Arndt | Ernst Lubitsch | Ernst Bloch | Karl Ernst von Baer | Heinrich Wilhelm Ernst | Ernst & Young Entrepreneur of the Year Award | Ernst van de Wetering | Ernst Toller | Ernst Thälmann Pioneer Organisation | Ernst Röhm | Ernst of Schaumburg | Ernst Ludwig Kirchner | Ernst Ludwig Gerber | Ernst Heinrich Weber | Ernst Hanfstaengl | Ernst Haefliger | Ernst Detlof von Krassow | Ernst Cassirer | Ernst | David Leonhardt | Joseph-Ernst Graf Fugger von Glött |