High-profile defector-lawmaker Tae Yong-ho lost his seat in parliament in South Korea’s general election on Wednesday, in a major setback to the former North Korean diplomat’s political career.

Tae’s resounding defeat to former Blue House official Yun Kun-young in Seoul’s Guro district came as the opposition trounced the lawmaker’s People Power Party (PPP) across the board, limiting the ruling party to just 108 out of 300 seats in the National Assembly.