Christian Social Union of Bavaria
The Christian Social Union in Bavaria (in German: Christlich-Soziale Union in Bayern) is a conservative political party in Germany that only runs for elections in the state of Bavaria. Since its foundation shortly after World War II, the CSU has formed a tight partnership with its sister party, the CDU, which competes for elections in the rest of Germany. Compared to the larger CDU, the CSU is arguably more socially conservative and closer to the Catholic church. In 1980 and 2002, the CSU ran candidates for the german chancellorship on a joint ticket with the CDU (Franz Josef Strauss in 1980 and Edmund Stoiber in 2002). The CSU is the largest party in the state of Bavaria by a substantial margin, and has ruled the state since 1953, usually with an absolute majority. Its chairman is Horst Seehofer.