Senior Minister Teo Chee Hean and Leader of the Opposition, Pritam Singh of the Workers' Party (WP), may differ on the methods of achieving racial integration, but both agree that no one should exploit racial or religious issues for political gain. During the end of a marathon debate on racial issues in Parliament, PAP Member of Parliament (MP) Sitoh Yih-Pin took it upon himself to ask Culture, Community and Youth Minister Edwin Tong to explain the relevance of the government's CMIO model of ethnic classification system (i.e. Chinese, Malay, Indian and Others). Tong took the bat and ran with it, saying the WP has questioned the continued relevance of the CMIO model and called for its removal.