After the failure of the Hamburg Uprising, and Maslow's return to Germany, Fischer, Maslow and Ernst Thälmann gained control of the German CP, at Brandler's expense. In April 1924, the 9th party convention elected her and Maslow co-chairpersons of the Communist Party of Germany. In May 1924, she travelled to the UK as a fraternal delegate to a sixth congress of the Communist Party of Great Britain, whom she accused of being too close to the Labour Party, and narrowly avoided being arrested in Manchester. She was elected to the Reichstag under her then legal name Elfriede Golke, and to the Prussian House of Representatives. In January 1925, she was arrested in Austria, after crossing the border illegally on a mission to revive the Austrian communist party.