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Sources

Every news outlet, social platform, legislative API, and prediction market the Political Temperature Index ingests. Bias bucket follows the AllSides 5-category scheme (Left / Lean Left / Center / Lean Right / Right). We do not pay for outlet inclusion and we do not weight individual outlets in volume, polarization, intensity, or friction. The 30-day share column shows the observed ingestion mix.

2163 listed2108 active1276 with articles in last 30 daysJSON API ↗

Sub-index weights (composite temperature)

30%Volume
30%Polarization
20%Intensity
10%Rhetoric
10%Friction

These five sub-indices are weighted to produce the daily composite. Individual outlets are not weighted in volume, polarization, intensity, or friction (every article counts once). Rhetoric, the 10% sub-index, multiplies each article's toxicity / inflammatory / GDELT-tone signal by sources.reliability_score, so higher-reliability outlets carry more influence in that sub-score. The reliability column on this page surfaces the values that drive it.

Bias balance

Two views of the same data. Source-count balance tells you how many distinct news + commentary outlets we ingested from in each bucket over the last 30 days; article-share balance weights by how many articles each outlet produced. Both views exclude (a) institutional sources like the White House Briefing Room, which carry no polarization signal by design, and (b) social platform rows (Reddit, YouTube), which contribute to polarization scoring through social_posts but are counted separately so one large platform doesn't skew the news-outlet mix. Dormant outlets (no articles in the window) are also excluded so the bars reflect the active mix, not the registered mix.

Source-count balance (distinct active outlets, last 30 days)

43%
38%
11%
Left
38 outlets
Lean Left
539 outlets
Center
471 outlets
Lean Right
134 outlets
Right
70 outlets

Article-share balance (volume-weighted 30-day mix)

10%
26%
28%
29%
Left
10.1%
Lean Left
25.7%
Center
28.2%
Lean Right
7.3%
Right
28.6%
Asymmetry drivers. Today the source-count balance is 30pp tilt toward Left + Lean Left. When the Left + Lean Left buckets outnumber Right + Lean Right, it usually reflects that more state/local newspapers and Substack commentary in our registry classify as lean-left than as lean-right, not a curation thumb on the scale. The Right and Lean Right outlets we do ingest often publish at higher article volumes per outlet (see the per-outlet share in the table below) — which is why the article-share balance is closer than the outlet-count balance. We surface both so you can judge for yourself.

47,933 articles in the last 30 days attributed to a listed outlet (these are what the bars above are weighted by).

19,188 (28.6%) ingested with no source attribution. This is a mix of two things: (a) genuine long-tail outlets we haven't curated yet (mostly via GDELT scraping the wider web), and (b) outlets that ARE in our registry but failed our domain-matching during ingest. We re-run attribution periodically to narrow the gap; the roadmap below tracks expansion.

203 articles came from institutional sources (agency_press_release, federal_register) that intentionally don't carry a polarization signal.

Outlet registry

1276 of 2163 sources
CategoryIntegration
The Hillthehill.com
Center0 · seed-sources
news0.75
6.53%3,128 articles· #1
RSS Aggregator
r/politics
Left-1.5 · seed-sources
social—
6.11%2,931 articles· #2
Reddit (Arctic-Shift)
Breitbartbreitbart.com
Right+3 · seed-sources
news0.40
3.61%1,732 articles· #3
RSS Aggregator
The Guardian UStheguardian.com
Left-1.5 · seed-sources
news0.75
3.45%1,652 articles· #4
auto-ingested
r/Conservative
Right+2 · seed-sources
social—
3.40%1,628 articles· #5
Reddit (Arctic-Shift)
Raw Storyrawstory.com
Left-2 · seed-sources
news0.50
3.29%1,576 articles· #6
RSS Aggregator
r/news
Lean Left-0.5 · seed-sources
social—
3.03%1,453 articles· #7
Reddit (Arctic-Shift)
r/conservatives
Right+1.5 · seed-sources
social—
2.42%1,161 articles· #8
Reddit (Arctic-Shift)
r/PoliticalHumor
Left-1.5 · seed-sources
social—
2.41%1,155 articles· #9
Reddit (Arctic-Shift)
CBS Newscbsnews.com
Lean Left-0.5 · seed-sources
news0.80
2.23%1,070 articles· #10
auto-ingested
New York Timesnytimes.com
Lean Left-1 · seed-sources
news0.85
2.19%1,050 articles· #11
auto-ingested
NBC Newsnbcnews.com
Lean Left-1 · seed-sources
news0.75
2.04%976 articles· #12
RSS Aggregator
The Ben Shapiro Showdailywire.com/show/the-ben-shapiro-show
Right+2 · seed-sources
news0.55
1.98%948 articles· #13
RSS Aggregator
Yahoo Newsyahoo.com
Center0 · seed-sources
news0.50
1.66%797 articles· #14
auto-ingested
r/law
Center0 · seed-sources
social—
1.64%786 articles· #15
Reddit (Arctic-Shift)
r/neoliberal
Lean Left-0.5 · seed-sources
social—
1.54%740 articles· #16
Reddit (Arctic-Shift)
r/AskConservatives
Lean Right+0.5 · seed-sources
social—
1.53%734 articles· #17
Reddit (Arctic-Shift)
r/socialism
Left-2.5 · seed-sources
social—
1.50%717 articles· #18
Reddit (Arctic-Shift)
r/LateStageCapitalism
Left-3 · seed-sources
social—
1.41%677 articles· #19
Reddit (Arctic-Shift)
Daily Callerdailycaller.com
Right+2 · seed-sources
news0.50
1.41%676 articles· #20
RSS Aggregator
Townhalltownhall.com
Right+2 · seed-sources
news0.50
1.41%674 articles· #21
RSS Aggregator
New York Postnypost.com
Right+1.5 · seed-sources
news0.55
1.32%635 articles· #22
RSS Aggregator
Politicopolitico.com
Lean Left-0.5 · seed-sources
news0.80
1.30%621 articles· #23
auto-ingested
Reutersreuters.com
Center0 · seed-sources
news0.95
1.29%617 articles· #24
auto-ingested
Washington Examinerwashingtonexaminer.com
Right+1.5 · seed-sources
news0.60
1.28%613 articles· #25
RSS Aggregator
Just The Newsjustthenews.com
Right+2 · seed-sources
news0.50
1.22%583 articles· #26
RSS Aggregator
Las Vegas Review-Journalreviewjournal.com
Lean Right+1 · seed-sources
news0.65
1.22%583 articles· #27
RSS Aggregator
PBSpbs.org
Center0 · seed-sources
news0.85
1.21%582 articles· #28
RSS Aggregator
Washington Postwashingtonpost.com
Lean Left-1 · seed-sources
news0.85
1.19%572 articles· #29
RSS Aggregator
RealClearPoliticsrealclearpolitics.com
Center0 · seed-sources
news0.70
1.17%559 articles· #30
RSS Aggregator
r/Economics
Center0 · seed-sources
social—
1.14%546 articles· #31
Reddit (Arctic-Shift)
CNNcnn.com
Lean Left-1 · seed-sources
news0.70
1.05%501 articles· #32
auto-ingested
BizPac Reviewbizpacreview.com
Right+2 · seed-sources
news0.45
1.02%487 articles· #33
RSS Aggregator
Associated Pressapnews.com
Center0 · seed-sources
news0.95
0.95%454 articles· #34
auto-ingested
RedStateredstate.com
Right+2 · seed-sources
news0.45
0.94%450 articles· #35
RSS Aggregator
PJ Mediapjmedia.com
Right+2 · seed-sources
news0.50
0.93%445 articles· #36
RSS Aggregator
Fox Newsfoxnews.com
Right+2 · seed-sources
news0.55
0.89%425 articles· #37
auto-ingested
r/PoliticalDiscussion
Center0 · seed-sources
social—
0.88%424 articles· #38
Reddit (Arctic-Shift)
Fox Businessfoxbusiness.com
Right+1.5 · seed-sources
news0.60
0.87%418 articles· #39
auto-ingested
The Western Journalwesternjournal.com
Right+2.5 · seed-sources
news0.40
0.84%401 articles· #40
RSS Aggregator
r/uspolitics
Lean Left-0.5 · seed-sources
social—
0.80%384 articles· #41
Reddit (Arctic-Shift)
r/democrats
Left-2 · seed-sources
social—
0.79%379 articles· #42
Reddit (Arctic-Shift)
r/AskALiberal
Lean Left-0.5 · seed-sources
social—
0.79%377 articles· #43
Reddit (Arctic-Shift)
Washington Timeswashingtontimes.com
Right+1.5 · seed-sources
news0.60
0.77%371 articles· #44
RSS Aggregator
Fox News (Opinion)foxnews.com/opinion
Right+1.5 · seed-sources
news0.40
0.76%362 articles· #45
auto-ingested
CNBCcnbc.com
Center0 · seed-sources
news0.75
0.73%352 articles· #46
auto-ingested
Volokh Conspiracyreason.com/volokh
Lean Right+0.5 · seed-sources
news0.65
0.72%344 articles· #47
RSS Aggregator
Wirecutternytimes.com/wirecutter
Lean Left-0.3 · seed-sources
news0.70
0.71%340 articles· #48
RSS Aggregator
BBCbbc.com
Center0 · seed-sources
news0.90
0.68%327 articles· #49
auto-ingested
New York Times (Opinion)nytimes.com/opinion
Left-1.5 · seed-sources
news0.65
0.66%315 articles· #50
auto-ingested
Page 1 of 26

Sources we tried but cannot ingest

Sources we evaluated and could not use directly, typically because of API policy changes or coverage that doesn't fit the scoring model. Documented here so the absence is visible.

  • MBFC

    Cross-validation

    Free tier insufficient (3 req/month). Use scripts/seed-sources.ts and scripts/import-allsides.ts instead

    requires: RAPIDAPI_KEY

    disabled

  • ProPublica Congress

    Legislative

    Shut down July 2024. Replaced by congressional-record.ts (Congress.gov API)

    deprecated

  • PredictIt

    Elections

    Replaced by Polymarket

    deprecated

  • ACLED

    Cross-validation

    API key cannot be obtained for small projects

    unavailable

Planned additions

Sources with code already written that aren't yet wired into a daily job, plus sources we're actively trying to add. See docs/future-work/source-coverage-gaps.md for the gap-close backlog (Spanish-language outlets, Crowd Counting Consortium, deeper non-coastal local coverage).

  • CourtListener

    Legislative
    planned

  • Google Civic

    Legislative

    requires: GOOGLE_CIVIC_API_KEY

    planned

  • GAO Reports

    Legislative
    planned

  • SCOTUSblog

    Legislative
    planned

  • Congressional XML

    Legislative
    planned

  • Snopes

    Cross-validation
    planned

  • Voteview

    Cross-validation
    planned

  • Wikipedia Pageviews

    Cross-validation
    planned

  • GDELT TV

    Cross-validation
    planned

  • BLS

    Economic

    requires: BLS_API_KEY

    planned

  • FRED

    Economic

    requires: FRED_API_KEY

    planned

  • Treasury Fiscal Data

    Economic
    planned

  • USAspending

    Economic
    planned

Methodology notes

30-day share is descriptive ingestion, not total influence. Each article counts once in volume, polarization, intensity, and friction (90% of the composite). The share column shows what fraction of articles attributed to a listed outlet came from each one over the last 30 days.

Rhetoric (10% of the composite) does weight by reliability. Inside the rhetoric sub-score, each article's toxicity, inflammatory, and GDELT-tone signal is multiplied by sources.reliability_score (default 0.5 for unknown sources). Higher-reliability outlets therefore carry more weight in that one sub-index. The reliability column on this page surfaces the values that drive it. This is the only place outlet-level weighting happens in scoring.

The 5-bucket display is wider than the runtime polarization classifier. Internally, polarization scoring uses a 3-bucket left / center / right classifier with a ±0.3 center band, so an outlet with bias_score = +0.28 displays as Lean Right here but scores as Center in polarization. The display taxonomy exists to communicate finer gradations to the public; it is not the same as the scoring taxonomy.

Bias provenance is recorded per row. seed-sources = numeric bias_score from our curated outlet table; allsides = AllSides string rating; mbfc = Media Bias / Fact Check; rss-lean = the lean field on the RSS feed entry when no other signal exists; institutional-default = institutional / agency sources that don't carry a polarization signal.

See the full methodology for the composite math, the EMA smoothing chain, and event detection. The machine-readable version of this page is at /api/sources.