[4] Prior to the 2008 election, Kim contested UDP preselection for Seongbuk 1st constituency[5][6][7] but lost to Son Pong-suk.

[15][16] In the 2020 election, Kim contested Democratic preselection for Seongbuk 1st constituency, and defeated the then incumbent MP You Seung-hee.

[17] However, You did not concede his defeat, and filed a lawsuit against Kim's 3 campaign members for breaching the Public Official Election Act.

[23][24] Kim attended Peniel High School before entering to Korea University, where he served as the President of the Student Council of College of Political Science and Economics.

[1][3] He flied to the United States in 2001, and gained another master's degree in public administration from Syracuse University in 2002.