Mahathir had been politically active since the end of Malaya's Japanese occupation when he joined protests against citizenship granting to non-Malays under the short-lived Malayan Union. He later argued for affirmative action for Malays at medical college. While at college, he contributed to "The Straits Times" under the pseudonym "C.H.E. Det" and a student journal, in which he fiercely promoted Malay rights, such as restoring Malay as an official language. While practising as a physician in Alor Setar, Mahathir became active in UMNO; by the time of the first general election for the independent state of Malaya in 1959, he was the chairman of the party in Kedah. Despite his prominence in UMNO, Mahathir was not a candidate in the 1959 election, ruling himself out following a disagreement with then Prime Minister Tunku Abdul Rahman. The relationship between the two Kedahans had been strained since Mahathir had criticised Abdul Rahman's agreement to retain British and Commonwealth forces in Malaya after independence. Now Abdul Rahman opposed Mahathir's plans to introduce minimum educational qualifications for UMNO candidates. For Mahathir, this was a significant enough slight to delay his entry into national politics in protest. The delay did not last for long. In the following general election in 1964, he was elected as the federal parliamentarian for the Alor Setar-based seat of Kota Setar Selatan.