The current Member of Parliament of the constituency is People's Action Party (PAP) Sitoh Yih Pin.

The constituency's most famous MP is Mr Chiam See Tong, who currently leads the Singapore People's Party.

Back when he was with the Singapore Democratic Party, he defeated the People's Action Party's candidate, Mah Bow Tan (who would later become a Cabinet Minister and MP for Tampines GRC) in the 1984 general election, as well as other candidates such as Sitoh Yih Pin and Andy Gan Lai Chiang.

Following the release of the EBRC report for the 2020 General Election, Blocks 210 to 224 of Lorong 8 Toa Payoh were consolidated into the 4-member Bishan–Toa Payoh GRC while this constituency in return, took the Joo Seng and Woodleigh neighbourhoods from the neighbouring Marine Parade GRC's Geylang Serai ward, to allow further development.

In 2025, Potong Pasir may be giving away the Tannery portion and Wan Tho Avenue to Jalan Besar GRC.