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  2. Polling errors represent average signed error of U.S. presid
Pew Research CenterGrouped bar chart · 30 points · Pew Research Center

Polling errors represent average signed error of U.S. presidential elections

The numbers behind a chart Pew Research Center published, redrawn natively. Check the original, study the data, then make your own.

Estimated from the image 31%All chart data
Chart by Pew Research Center. Source: x.com

Simplified redraw

Drawn by us from the numbers below. Hover, tap or use the arrow keys.

A simplified redraw: it shows the numbers in our own look, not the look of the original. One accent marks what the chart is about. Values marked with ~ in the table are estimates.

The numbers

First 10 of 30 points are free
GroupSeriesValue (percentage points)SourceConf.
1940Red bars~-2.5Estimate0.30
1944Blue bars~0.5Estimate0.30
1948Red bars~-4.5Estimate0.30
1952Blue bars~3.5Estimate0.30
1956Red bars~-1.5Estimate0.30
1960Blue bars~0.5Estimate0.30
1964Blue bars~1.5Estimate0.30
1968Red bars~-1Estimate0.30
1972Red bars~-1Estimate0.30
1976Blue bars~5.5Estimate0.30

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1980Red bars~-1.5Estimate0.30
1984Red bars~-1.5Estimate0.30
1988Blue bars~1Estimate0.30
1992Blue bars~2Estimate0.30
1996Red bars~-2Estimate0.30
2000Blue bars~0.5Estimate0.30
2008Blue bars~-0.1Estimate0.30
2012Red bars~-3Estimate0.30
2016Blue bars~3.7Estimate0.30
2020Blue bars~3.7Estimate0.30
2024Blue bars~2.5Estimate0.30
1964Red bars~-1.5Estimate0.30
2004Red bars~-3Estimate0.50
1940Blue bars~1Estimate0.30
1948Blue bars~3.5Estimate0.30
1956Blue bars~1.5Estimate0.30
1972Blue bars~1.5Estimate0.30
1984Blue bars~2.5Estimate0.30
1996Blue bars~1Estimate0.30
2004Blue bars~1Estimate0.30
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On the Max plan you can pull this chart's numbers with the provenance of each one, as JSON or CSV, with its redraw spec, or call it from an agent over MCP. Chart id 1109de574ace.

Approximate values. Our two readings of this chart agreed only in part (confidence 0.31 of 1), so check the original before you quote a number. The API marks it lowConfidence, and ?min_confidence=0.5 leaves it out.

See the Max planAPI docs
PathReturnsPlan
GET/api/v1/charts/1109de574aceTitle, publisher, date, form, point count; with a Max key, the data linkOpen
GET/api/v1/charts/1109de574ace/dataEvery point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSVMax
GET/api/v1/charts/1109de574ace/render?view=1The draw-only view this page usesOpen
POST/mcpTool get_chart_data with this id, for Claude, Cursor and other agentsMax
curlMax
curl -s https://viral-chart.com/api/v1/charts/1109de574ace/data \
  -H "Authorization: Bearer $VIRALCHART_KEY"
Claude CodeMax
claude mcp add --transport http viralchart https://viral-chart.com/mcp \
  --header "Authorization: Bearer $VIRALCHART_KEY"

60 requests a minute per key; over that you get 429 with Retry-After. Up to 5 keys per account, made on your account page and shown once. Without Max, the data route answers 402 with a link to the plans. The numbers describe a chart its publisher owns, and every file carries a license note.

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More data from Pew Research Center

All chart data
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Questions people ask

How accurate are these numbers?

They are estimated from the image by two independent passes, with confidence 0.31 on a 0 to 1 scale. Printed numbers read well; values read off an axis can be a few percent off.

Can I reuse this data?

The numbers describe a chart that Pew Research Center published. The image, layout and styling belong to them. Use the numbers with a credit to the publisher, and make your picture from your own data.

How do I get the file?

The JSON, CSV and agent skill file are under the email gate on this page. In this prototype they are static files at /api/charts/1109de574ace.json and /api/charts/1109de574ace.skill.md.