LEFT BIAS
These media sources are moderate to strongly biased toward liberal causes through story selection and/or political affiliation. They may utilize strong loaded words (wording that attempts to influence an audience by appealing to emotion or stereotypes), publish misleading reports, and omit information that may damage liberal causes. Some sources in this category may be untrustworthy. See all Left Bias sources.
- Overall, Proof by Seth Abramson is rated Left Biased due to strong progressive framing, emotional language, and consistent criticism of conservative politics and mainstream media perceived as insufficiently anti-Trump. The site is rated Mostly Factual for factual reporting, relying heavily on credible sources but occasionally presenting speculative or inferential claims as established conclusions.
Detailed Report
Bias Rating: LEFT (-7.4)
Factual Reporting: MOSTLY FACTUAL (3.6)
Country: USA
MBFC’s Country Freedom Rating: MOSTLY FREE
Media Type: Website
Traffic/Popularity: Medium Traffic
MBFC Credibility Rating: MEDIUM CREDIBILITY
History
Proof is a political Substack newsletter by Seth Abramson, a former attorney, professor, and author of Proof of Collusion. Launched in the late 2010s, the site uses “curatorial journalism” to synthesize and interpret major-media reports on U.S. and global politics, with a focus on the Trump era. Abramson’s work has appeared in The Washington Post, The Guardian, and Newsweek, and his Substack ranks among the top political newsletters.
Read our profile on the United States media and government.
Funded by / Ownership
Proof is owned and authored solely by Seth Abramson and funded through Substack subscriptions ($6/month or $60/year) and related book sales. There is no evidence of outside investors or institutional sponsorship.
Analysis / Bias
Proof strongly supports progressive political narratives and routinely criticizes right-wing figures and media institutions. Articles such as “We Now Know What Really Happened in Atlanta” and “Events Since the Traitorous Eight Caved” portray mainstream outlets as complicit in misleading the public and defend President Biden while condemning Donald Trump and “MAGA” politics.
The writing is emotionally charged, framing conservative actors as threats to democracy while asserting moral clarity. While the publication frequently links to credible mainstream reporting, its “curatorial” approach often layers speculative interpretation and ideological conclusions on top of factual content. Critics in The Atlantic and The New Republic have labeled Abramson’s style as “conspiratorial,” while Politico and Der Spiegel have praised his persistence and early investigative insights.
Failed Fact Checks
- Abramson’s work has not been specifically fact-checked by IFCN-certified outlets like PolitiFact or FactCheck.org, but multiple mainstream media critiques—Slate, Columbia Journalism Review, and The Atlantic—have described his analyses as containing conjecture and overinterpretation rather than direct falsehoods. No major retractions or formal fact-checking failures were found.
Overall, Proof by Seth Abramson is rated Left Biased due to strong progressive framing, emotional language, and consistent criticism of conservative politics and mainstream media perceived as insufficiently anti-Trump. The site is rated Mostly Factual for factual reporting, relying heavily on credible sources but occasionally presenting speculative or inferential claims as established conclusions. (D. Van Zandt 11/18/2025)
Source: https://sethabramson.substack.com/
Last Updated on November 18, 2025 by Media Bias Fact Check
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Left vs. Right Bias: How we rate the bias of media sources