Otto Johann Maximilian Strasser (also , see
ß; 10 September 1897 – 27 August 1974) was a
German politician and member of the
Nazi Party. Otto Strasser, together with his brother
Gregor Strasser, was a leading member of the party's
left-wing faction, and broke from the party due to disputes with the ‘Hitlerite’ faction. He formed the
Black Front, a group intended to split the Nazi Party and take it from the grasp of Hitler. This group also functioned during his exile and World War II as a
secret opposition group.