German politician, who since the 4 March 2020 is serving as Minister President of Thuringia, an office he previously held from 2014 to February 2020. He is the first head of a German state government to serve non-consecutive terms in office since Eberhard Diepgen, who served two times as Governing Mayor of Berlin (1984–1989 and 1991–2001). A member of The Left, he previously chaired the party's group in the Landtag of Thuringia.