 When his request, backed by his Minister of War Albrecht von Roon was refused, William first considered abdicating, but his son, the Crown Prince, advised strongly against it.Then, on the advice of Roon, William appointed Otto von Bismarck to the office of Minister President in order to force through the proposals.According to the Prussian constitution, the Minister President was responsible solely to the king, not to the "Landtag".