Heinrich Brüning
The SPD entered into a coalition with the Zentrum, DVP, and DDP after the 1928 federal election. During this time, Aufhäuser called for the termination of the coalition if the SPD could not advance its agenda. Tensions came to a boiling point after the onset of the Great Depression, and the government ultimately fell in March 1930 after a dispute over the unemployment insurance program. The SPD returned to opposition and a new conservative cabinet under Heinrich Brüning was formed, of which Aufhäuser was fiercely critical.