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Fact-checking: Seth Moulton, John Deaton in Massachusetts U.S. Senate debate

The article checks Deaton’s claims about Moulton’s ICE position, Markey’s electricity costs and Moulton’s legislative record.

Fact-checking: Seth Moulton, John Deaton in Massachusetts U.S. Senate debate
Image · WCVB

SOURCE CHECK

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Host credibilityWCVB76/100 HIGH
This article1 analysis · Oct 5, 2026

Credibility rates WCVB, which republished this story. The other scores rate the article itself.

Republished

Republished from Politifact. The relationship between the two publishers has not been determined.

Politifact83/100 HIGH

55 stories · 82–84 · updated Oct 9, 2026

This is Politifact's own score, and this article is credited to Politifact. The host score in the Source Check is WCVB's.

WCVBvia Politifact
Jun 17, 2026
tl;dr

Seth Moulton and John Deaton faced off in a Massachusetts Senate debate, where each criticized incumbent Ed Markey and discussed immigration, energy and other issues. A fact-check found some claims accurate, while others needed context or were inaccurate.

Community verdict

12 VOTES
How does this story look for
John Deaton R · MA
● OPEN

People in this story

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Republican Senate candidate whose debate statements were fact-checked

PRIMARY SUBJECT
Seth Moulton
D · MA-6

Democratic Senate candidate whose debate statements were fact-checked

Moulton's version of this story ↗
Peter T. King
Former U.S. Representative (R-NY)

Former representative who introduced a bill with Moulton

Ed Markey
D · MA · SEN

Incumbent senator and subject of criticism and discussion in the debate

Donald Trump
R · President of the United States

President whose administration sought to halt offshore wind development

Former president who signed legislation that included the Brandon Act

Elizabeth Warren
D · MA · SEN

Senator whom Deaton challenged in the 2024 general election

Part of a bigger story

4 OUTLETS
John Deaton and Seth Moulton Debate in Massachusetts Senate Primary

John Deaton and Seth Moulton debated in a Massachusetts Senate primary without incumbent Ed Markey, who did not participate. The candidates criticized each other and discussed issues including immigration and President Trump. Center outlets describe the candidates’ exchanges and include scrutiny of debate claims, while right-leaning outlets emphasize their clashes over Trump and immigration.

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