In 1989, DKP joined with two other left-wing parties, the Left Socialists, and the Trotskyist Socialist Workers Party to form the broad-based Unity List – The Red-Green Alliance (Danish: "Enhedslisten – De Rød-Grønne"). Gert Petersen, then-Chairman of the Socialist People's Party (SF), claimed at the time that cooperation between such diffuse ideological currents would fail. Not all members of DKP anticipated the launching of the Unity List either, and some chose to split with the party in 1990 to found a new Communist party, Communist Party in Denmark (KPiD). The Unity List has been a cause of political strife in relation to Danish Communists ever since. There are several issues, the two main ones being dual membership and Communist unity.