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2026 candidates we're tracking in MA-4
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Jake Auchincloss
Democratic
Incumbent
Jake Auchincloss is the sitting U.S. Representative for this district, per the chamber's current membership roster, and is seeking reelection on the certified September 1 primary list.
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Jason Poulos
Democratic
Jason Poulos is an artificial intelligence researcher from Sherborn with a doctorate from UC Berkeley in political science and computational science and engineering, per Brookline.News and his campaign site. He previously held a postdoctoral research position …
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Thomas Stalcup
Republican
Thomas Stalcup is a physicist with a doctorate in condensed-matter research who runs a business designing software for remote weather stations, per his campaign site and Brookline.News. He lives in Brookline, where he has served on an elected school council an…
About this race
Massachusetts's 4th Congressional District elects one member of the U.S. House of Representatives to a two-year term. Every House seat in the country is on the ballot in 2026. The Massachusetts primary is Tuesday, September 1, 2026, and the general election is Tuesday, November 3, 2026.
Massachusetts primary details → · Massachusetts voter guide →