Though out of office, his personal influence continued to be very great both at Munich and Berlin, in no small part due to the favorable terms of the treaty of the North German Confederation with Bavaria, which embodied his views, and with its acceptance by the Bavarian parliament. Elected a member of the German Reichstag, he was on 23 March 1871 chosen as one of its vice-presidents. He was instrumental in founding the new groups which took the name of the Liberal Imperial party (Liberale Reichspartei), the objects of which were to support the new empire, to secure its internal development on Liberal lines, and to oppose the Catholic Centre.