
Katherine Marlea Clark is an American lawyer and politician representing Massachusetts's 5th Congressional District, the Boston northern and western suburbs seat covering communities including Medford, Waltham, Woburn, Framingham, and Malden. She has served as House Minority Whip since January 2023, the second-ranking position in the House Democratic leadership. Born on July 17, 1963, in New Haven, Connecticut, she attended St. Lawrence University and earned her JD from Cornell Law School, later completing study at Harvard's Kennedy School of Government. She worked as an attorney in multiple states before moving to Massachusetts in 1995, where she entered public service and built a reputation focused on education and child welfare. She is married, has children, and has represented the Melrose and greater northern Boston suburbs community for more than two decades.
Clark built her political career through a complete state and local ladder: she served on the Melrose School Committee, eventually as chair, and then in the Massachusetts House of Representatives, winning her first state house race in 2008. She won a Massachusetts state senate seat in 2010, defeating an incumbent, and served through 2013 on issues spanning education policy, criminal justice, and municipal pension reform. When Representative Ed Markey left his seat to run for Senate in 2013, Clark won the special election with 65.75% and has been reelected to MA-05 every cycle since with margins ranging from 74% to effectively unopposed. She became House Assistant Speaker in the 117th Congress and was elected House Minority Whip for the 118th and 119th Congresses, making her the highest-ranking member of the Massachusetts congressional delegation.
Clark serves on the Appropriations Committee with subcommittees covering labor, health and human services, education, transportation, housing, and the legislative branch, a portfolio that aligns with her longstanding policy focus on early childhood education, paid family leave, and domestic violence prevention. As Minority Whip she is the principal Democratic vote-counter and floor strategist, responsible for ensuring the caucus holds together on procedural and legislative votes, a role that has made her one of the most institutionally important members of the House Democratic leadership team alongside Hakeem Jeffries. Her AIPAC donor relationship at $371,347, almost entirely individual contributions, is among the largest in the Massachusetts delegation and reflects her pro-Israel positioning as Minority Whip.
Clark has been a consistent progressive voice on social issues while maintaining a reputation as a disciplined institutional operator. She has focused on legislation against cyberstalking and online harassment, introduced the Stop Online Suicide Assistance Forums Act with bipartisan support, and has worked on prescription drug abuse, early childhood education, and animal protection alongside her Appropriations work. In April 2023, her adult daughter Riley, then 23, was arrested in connection with events at a Boston-area protest, an incident that drew significant national attention and prompted scrutiny of Clark's response and the relationship between her family life and her public role as a senior Democratic leader.
Mainstream Liberal
Committee Assignments
Leadership and Caucus
Achievements
- Serves as House Minority Whip, the second-ranking position in the Democratic House leadership and the principal vote-counting and floor strategy role in the caucus, making her the highest-ranking member of the Massachusetts congressional delegation and one of the most institutionally consequential Democrats in the House alongside Leader Hakeem Jeffries.
- Built a complete political career ladder from the Melrose School Committee through the Massachusetts House, Massachusetts Senate, and then Congress, winning Ed Markey's seat in a 2013 special election and maintaining margins of 74% or above in every general election through 2024, one of the most dominant safe-seat holds in the Massachusetts delegation.
- Serves on the Appropriations Committee with three subcommittees covering labor, health and education, transportation and housing, and the legislative branch, giving her oversight of the largest domestic discretionary spending bills in the federal budget alongside her leadership duties.
- Has built a substantive legislative record on cyberstalking, online harassment, prescription drug abuse, early childhood education, and domestic violence prevention, centering family- and child-focused policy throughout her career from the Melrose School Committee through her congressional tenure.
Controversies
- In April 2023, Clark's adult daughter Riley, then 23, was arrested in connection with events at a Boston-area protest. The incident drew significant national media attention and scrutiny of Clark's response, with some commentators noting the tension between her role as a senior Democratic leader and the circumstances of her family member's legal situation.
- Her AIPAC donor relationship at $371,347, almost entirely from individual donors in the AIPAC network, is among the largest in the Massachusetts delegation. Progressive critics have argued the scale of this investment shapes her Israel-Palestine positioning and constrains her ability to advocate for Palestinian civilian protections during the Gaza conflict.
- Has faced periodic criticism from the progressive wing of the Democratic caucus for her institution-first leadership style and message discipline as Minority Whip, with some activists arguing her whip role prioritizes party tactical positioning over substantive progressive policy outcomes on issues like Gaza and domestic spending.
Top Donors
| Donor | Total | Individuals | PACs |
|---|---|---|---|
| American Israel Public Affairs Cmte | $371,347 | $366,347 | $5,000 |
| Google Inc | $33,485 | $23,485 | $10,000 |
| Capital Group | $32,500 | $32,500 | $0 |
| JStreetPAC | $31,000 | $26,000 | $5,000 |
| Akin, Gump et al | $26,850 | $16,850 | $10,000 |
The organizations themselves cannot donate; totals reflect contributions from individuals and PACs affiliated with each entity.
Recent Elections
2018 General Election (MA-05)
Won D +51.8%| Candidate | Votes | % |
|---|---|---|
| [D]Katherine Clark (incumbent)✓ Winner | 236,243 | 75.9% |
| [R]Republican Opponent | 75,000 | 24.1% |
2020 General Election (MA-05)
Won D +48.6%| Candidate | Votes | % |
|---|---|---|
| [D]Katherine Clark (incumbent)✓ Winner | 294,427 | 74.3% |
| [R]Republican Opponent | 101,400 | 25.6% |
2022 General Election (MA-05)
Won D +48.0%| Candidate | Votes | % |
|---|---|---|
| [D]Katherine Clark (incumbent)✓ Winner | 203,994 | 74.0% |
| [R]Republican Opponent | 71,500 | 26.0% |
2024 General Election (MA-05)
Won D (unopposed)| Candidate | Votes | % |
|---|---|---|
| [D]Katherine Clark (incumbent)✓ Winner | 286,689 | 98.2% |
Massachusetts uses a traditional partisan primary and general election system. MA-05 covers Boston's northern and western suburbs including Medford, Waltham, Woburn, Framingham, and Malden. Note: Republican opponent names for 2018 through 2022 are placeholders to be filled with sourced data.
