 On 23 February 1972, SPD deputy Herbert Hupka, who was also leader of the "Bund der Vertriebenen", joined the CDU in disagreement with Brandt's reconciliatory efforts towards the east.On 23 April 1972, Wilhelm Helms (FDP) left the coalition.The FDP politicians Knud von Kühlmann-Stumm and Gerhard Kienbaum also declared that they would vote against Brandt; thus, Brandt had lost his majority.