In 1944, the Nyasaland African Congress (NAC) was formed by the Africans of Nyasaland to promote local interests to the British government. In 1953, Britain linked Nyasaland with Northern and Southern Rhodesia in what was the Federation of Rhodesia and Nyasaland, often called the Central African Federation (CAF), for mainly political reasons. Even though the Federation was semi-independent, the linking provoked opposition from African nationalists, and the NAC gained popular support. An influential opponent of the CAF was Hastings Banda, a European-trained doctor working in Ghana who was persuaded to return to Nyasaland in 1958 to assist the nationalist cause. Banda was elected president of the NAC and worked to mobilise nationalist sentiment before being jailed by colonial authorities in 1959. He was released in 1960 and asked to help draft a new constitution for Nyasaland, with a clause granting Africans the majority in the colony's Legislative Council.