The CDU and the CSU are two different parties with separate nominations. In the German Bundestag
they form a joint parliamentary group. Section 10 (1) of the Rules of Procedure of the German
Bundestag permits the formation of joint parliamentary groups by parties which do not compete in
any Land due to convergent political goals.
The CDU and the CSU pursue common political goals. The CSU stands for election in Bavaria
only, the CDU in all other Länder. Their election results are presented separately by the Federal
Returning Officer, but are often counted together in the media, to which there is no objection.