Hitler weakened other political parties by passing the Enabling Act 1933 which allowed him to control commands
Arrests and Imprisonment - Members of Social Democratic Party and the Communist Party were arrested and often sent to concentration camps
Nazis also banned KPD and SPD making them illegal organisations
Intimidation and Violence - The SS used intimidation and violence to suppress any remaining opposition, this created fear making it dangerous to associate or support opposition groups
Night of the LongKnives
,Creation of OneParty State - By 1934 Nazi was the sole legal political party in Germany (this eliminated other parties) giving Hitler full control over Germany