However, the racial factor was worsened with the inclusion of Singapore, which increased the Chinese proportion to more than 40%. Both UMNO and the MCA were nervous about the possible appeal of Lee Kuan Yew's People's Action Party (PAP) to voters in Malaya, and tried to organize a party in Singapore to challenge Lee's position there, despite an earlier agreement that he would not do so (see PAP-UMNO relations). Lee in turn retaliated by running PAP candidates in Malaya at the 1964 federal elections, winning one seat.