President Paul Biya's Cameroon People's Democratic Movement (CPDM) was the only legal political party until December 1990. Numerous regional political groups have since formed. The primary opposition is the Social Democratic Front (SDF), based largely in the Anglophone region of the country and headed by John Fru Ndi.[33] Biya and his party have maintained control of the presidency and the National Assembly in national elections, but rivals contend that these have been unfair.[20] Human rights organisations allege that the government suppresses the freedoms of opposition groups by preventing demonstrations, disrupting meetings, and arresting opposition leaders and journalists.[31][34] Freedom House ranks Cameroon as "not free" in terms of political