[4] Koh joined the Biden Administration in 2021 as Chief of Staff to his former boss Marty Walsh, who became United States Secretary of Labor.

[5] Koh left the Department of Labor in August 2022 to become Special Assistant to the President and White House Deputy Cabinet Secretary.

[9] Koh did not run and Kim Driscoll was ultimately elected lieutenant governor.

[10] His uncle is Harold Hongju Koh, former Dean of Yale Law School and Legal Adviser of the Department of State.

Koh married Amy Jean Sennett at Boston City Hall on June 23, officiated by Marty Walsh.