Tom Stalcup, a physicist and entrepreneur, is the Republican nominee for Massachusetts's 4th congressional district in 2026, facing Democratic incumbent Jake Auchincloss in the November 3 general election.
2026 Races & Market Forecast
Live TruthIndex™ and prediction market consensus for races contested by Tom Stalcup.
Biography & Campaign Analysis
2026 race
Tom Stalcup, a physicist and entrepreneur, is the Republican nominee in the 2026 election for Massachusetts's 4th congressional district, which covers much of southeastern Massachusetts and includes Newton, Attleboro and Fall River.
The seat is held by Democrat Jake Auchincloss, who was re-elected uncontested in 2024 and is running for another term after ruling out a bid for the U.S. Senate. Stalcup won the Republican primary with 21,905 votes, or 99.4%.
Auchincloss secured renomination by defeating AI researcher Jason Poulos with 73.1% of the Democratic primary vote. Stalcup and Auchincloss face each other in the general election on November 3, 2026.