At the federal level, the CSU forms a common faction in the Bundestag with the CDU which is frequently referred to as the Union Faction (die Unionsfraktion) or simply CDU/CSU. The CSU has 43 seats in the Bundestag since the 2021 federal election,[20] making it currently the second smallest of the seven parties represented. The CSU is a member of the European People's Party and the International Democrat Union.
Party leader Markus Söder serves as Minister-President of Bavaria, a position that CSU representatives have held from 1946 to 1954 and again since 1957. From 1962 to 2008 and from 2013 to 2018, the CSU had the absolute majority in the Bavarian Landtag.
^Boswell, Christina; Hough, Dan (2009). "Politicizing migration : opportunity or liability for the centre-right in Germany?". Immigration and integration policy in Europe : why politics -- and the centre-right -- matter. By Bale, Tim. Journal of European Public Policy Series. London: Routledge. pp. 18, 21. ISBN9780415468343. OCLC461254258.
^Klaus Detterbeck (2012). Multi-Level Party Politics in Western Europe. Palgrave Macmillan. p. 105.
^Hornsteiner, Margaret; Saalfeld, Thomas (2014). "Parties and the Party System". Developments in German Politics. By Padgett, Stephen; Paterson, William E.; Zohlnhöfer, Reimut. Vol. 4. Basingstoke, Hampshire: Palgrave Macmillan. p. 80. ISBN9781137301635. OCLC885477730.