Seth Moulton
Running for U.S. Senate — 2026 election
As of August 2026, Seth Moulton is a Democratic candidate for U.S. Senate in Massachusetts in the 2026 election. No campaign finance filings or stock disclosures have been recorded for this candidate yet. This page updates automatically as primary-source filings appear.
Data last updated August 2026.
Seth Wilbur Moulton is the U.S. Representative for Massachusetts's 6th congressional district, a seat he has held since January 2015. A Democrat, he served four tours in Iraq as a Marine Corps officer before attending Harvard, where he earned a bachelor's in physics and later master's degrees from the Harvard Business School and Harvard Kennedy School. On October 15, 2025, he announced a challenge to incumbent Senator Ed Markey in the 2026 Massachusetts Democratic U.S. Senate primary.
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