Simplify the following text for a Grade 14 native English-speaking person.
Original: However so far the Constitutional court has only used this power twice , outlawing the KPD ( Communist Party of Germany ) and the SRP ( Socialist Reich Party , a successor to the NSDAP ) because both parties ideas went against the constitution .
Simplified: However , so far the Constitutional court has only used this power twice , outlawing the SRP ( Socialist Reichs Party , a successor to the NSDAP ) in 1952 , and the KPD ( Communist Party of Germany ) in 1956 .