Seth Moulton Bio
Seth Wilbur Moulton (born 24 October 1978) is an American politician, Marine Corps combat veteran, and entrepreneur. A member of the Democratic Party, he has served as the U.S. Representative for Massachusetts’s 6th congressional district since 2015, representing Boston’s northern suburbs including Andover, Marblehead, Peabody, and his hometown of Salem. Moulton is also known for his service in the Iraq War, his short-lived 2020 presidential campaign, and his 2026 challenge to incumbent Senator Ed Markey.
Before entering Congress, Moulton graduated from Harvard College with a degree in physics, served four tours in Iraq as a Marine Corps infantry officer, and earned dual graduate degrees from Harvard Business School and the Harvard Kennedy School. He is a co-founder of a healthcare venture and the founder of Serve America PAC, an organization that supports Democratic candidates with national service backgrounds.
Early Life and Background
Seth Wilbur Moulton was born on 24 October 1978 in Salem, Massachusetts, to Lynn Alice Meader Moulton, a secretary, and Wilbur Thomas Moulton Jr., a real estate attorney. He has two younger siblings, Eliza and Cyrus, and grew up in Marblehead, Massachusetts. Moulton comes from a New England family with deep regional roots, and his upbringing in the coastal communities north of Boston shaped his early interest in public service.
Moulton attended Phillips Academy Andover, graduating in 1997, and went on to Harvard College, where he earned a Bachelor of Science in physics in 2001. At his Harvard commencement, he delivered the Undergraduate English Oration, focusing on the theme of service to country. His academic path combined rigorous scientific training with a longstanding interest in civic responsibility and leadership.
A few months after graduating from college and before the September 11, 2001 attacks, Moulton joined the United States Marine Corps. He attended Officer Candidate School in Quantico, Virginia, and was commissioned as a second lieutenant in 2002, beginning a military career that would take him to Iraq four times over the next six years.
Path to US Politics
After leaving the Marine Corps in 2008 with the rank of captain, Moulton enrolled in a dual-degree program at Harvard Business School and the Harvard Kennedy School, earning a Master of Business Administration and a Master in Public Administration in 2011. While at Harvard, he served as a resident tutor in Quincy House and began laying the groundwork for a transition into business and public life.
Following graduate school, Moulton worked for one year as managing director of the Texas Central Railway, a private transportation firm. In 2011, he co-founded Eastern Healthcare Partners, a healthcare venture that he later cited as evidence of his private-sector experience. Though the company had not generated significant revenue by the time he entered politics, it helped introduce him to networks of investors, executives, and policy experts in the Boston area.
Moulton first considered a run for Congress in 2012 as an independent challenger to Democratic Representative John F. Tierney, but ultimately decided against it, citing the short timeline. Two years later, on July 8, 2013, he announced his candidacy in the 2014 Democratic primary for Massachusetts’s 6th congressional district, setting the stage for his successful entry into US politics.
Seth Moulton Career
Early Career (2001-2014)
Moulton’s early professional life was defined by military service. As a Marine Corps infantry officer, he led one of the first platoons to enter Baghdad during the 2003 invasion of Iraq and participated in the Battle of Nasiriyah. For his actions in saving a Marine wounded by friendly fire, he received the Navy and Marine Corps Commendation Medal for valor. He later took part in the 2004 Battle of Najaf against the militia of Muqtada al-Sadr, where he was awarded the Bronze Star Medal for leading his platoon under heavy fire.
During his four tours in Iraq between 2003 and 2008, Moulton also co-hosted a television program with his Iraqi interpreter, was featured prominently in the 2007 Academy Award-nominated documentary No End in Sight, and was frequently interviewed by national media. In 2008, General David Petraeus requested that he serve as a special liaison with tribal leaders in Southern Iraq before his discharge from the Marine Corps as a captain.
Congressional Career Breakthrough (2014-2018)
Seth Wilbur Moulton officially entered Congress after defeating incumbent Democrat John F. Tierney in the 2014 primary with 50.8 percent of the vote. He went on to win the general election against Republican state Senator Richard Tisei with 55.0 percent of the vote, earning endorsements from figures including Senator Elizabeth Warren and retired General Stanley McChrystal. He was sworn into the 114th United States Congress on January 3, 2015.
He was unopposed for reelection in 2016 and won a second term in 2018 with 65.2 percent of the vote against Republican nominee Joseph Schneider. During that cycle, he created the Serve America PAC, which raised over $7.5 million to elect Democratic candidates with national service experience and helped flip 15 Republican seats. In November 2018, Moulton spearheaded a high-profile effort to oust Nancy Pelosi as House Democratic leader, offering Representative Karen Bass as his alternative; Pelosi ultimately won the Democratic nomination for Speaker by a 203-to-32 vote.
House Leadership and Presidential Bid (2019-2020)
On April 22, 2019, Moulton announced his candidacy for the 2020 Democratic presidential nomination, becoming one of the earliest sitting congressmen to launch a White House bid. He campaigned across Iowa, New Hampshire, and South Carolina, criticizing Joe Biden’s 2002 vote authorizing the Iraq War and challenging progressive rival Bernie Sanders.
Despite his national profile, Moulton never polled above 2 percent in any Democratic presidential opinion poll, failed to qualify for the first two Democratic debates, and laid off half of his campaign staff in August 2019. He suspended his campaign on August 23, 2019, and returned to his House duties.
Continued House Service and Senate Challenge (2021-Present)
Moulton has continued to represent Massachusetts’s 6th congressional district, winning reelection in 2020 with 78 percent of the vote in the primary and 65.4 percent in the general election, in 2022 with 62.9 percent against Republican Bob May, and in 2024 unopposed. He has been a vocal moderate voice in the Democratic caucus, co-founding legislation on mental health, gun control, renewable energy, and veterans’ affairs.
In August 2021, he made an unannounced visit to Hamid Karzai International Airport during the Afghanistan evacuation, drawing criticism from the Biden administration and Speaker Pelosi. On July 4, 2024, Moulton became one of the first members of Congress to call for President Joe Biden to withdraw from the 2024 presidential race. On October 15, 2025, he announced a primary challenge against Senator Ed Markey in the 2026 Massachusetts Democratic Senate primary, citing Markey’s age as a factor.
Notable Events and Milestones
Among Moulton’s most notable career moments are his role in leading a platoon into Baghdad in 2003, his receipt of the Bronze Star and Navy and Marine Corps Commendation Medal for valor, his successful 2014 primary challenge to an incumbent Democrat, his 2018 campaign against Nancy Pelosi’s leadership, his 2019 presidential campaign, and his October 2025 announcement of a 2026 Senate primary challenge against Ed Markey.
Seth Moulton Career Wins
Seth Wilbur Moulton has built a record of electoral victories since entering Congress in 2014, consistently winning his Massachusetts’s 6th congressional district seat by wide margins. His victories span Democratic primaries, general elections, and his 2025 announcement of a 2026 U.S. Senate primary campaign.
Congressional Election Highlights
Moulton first won his seat in 2014 by defeating nine-term incumbent John F. Tierney in the Democratic primary with 50.8 percent of the vote and then winning the general election against Richard Tisei with 55.0 percent. He was unopposed in 2016, won 65.2 percent in 2018, and has since continued to dominate the district, taking more than 60 percent in both 2020 and 2022 and running unopposed in 2024.
His most recent win came in 2024, when he secured reelection without opposition. On October 15, 2025, Moulton announced his next political contest: a Democratic primary challenge to Senator Ed Markey for the 2026 U.S. Senate race in Massachusetts.
Other Wins & Achievements
Beyond electoral success, Moulton earned combat decorations including two Bronze Star Medals with valor and the Navy and Marine Corps Commendation Medal with valor for his Iraq War service. He was also recognized as the 34th most bipartisan member of the U.S. House during the 114th Congress by the Lugar Center and McCourt School Bipartisan Index, and his Serve America PAC played a key role in flipping 15 Republican House seats in 2018.
Seth Moulton Family
Family Background and Lineage
Seth Wilbur Moulton was raised in a New England family by his father, Wilbur Thomas Moulton Jr., a real estate attorney, and his mother, Lynn Alice Meader Moulton, a secretary. He has two younger siblings, Eliza and Cyrus, and grew up in Marblehead, Massachusetts, a coastal community north of Boston. His family’s strong regional ties have been a consistent theme throughout his political career, with his district including his hometown of Salem.
Personal Life
On June 23, 2017, Moulton announced his engagement to Liz Boardman, a senior client partner at an executive search firm. The couple married at the Old North Church in Marblehead, Massachusetts, on September 22, 2017, and she took his surname, becoming Liz Moulton. Their first child was born in October 2018, and their second child was born in February 2021. In 2019, Moulton publicly shared that he had been diagnosed with post-traumatic stress disorder following his Marine Corps service.