Following the 2017 elections, Berghegger unsuccessfully challenged Mathias Middelberg as head of the group of CDU parliamentarians from Lower Saxony.Jean-Charles Fays (29 September 2017), Abgeordnete aus Region Osnabrück: CDU-Machtkampf zwischen Berghegger und Middelberg Neue Osnabrücker Zeitung.
