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Tracked Cases
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Explore the Data
Justice Profiles
Voting record by issue area, Martin–Quinn ideology trajectory, agreement rates, and a sourced timeline of each justice's speeches, writings, and testimony.
Compare Their Words
One question, all nine justices — semantic search across confirmation hearings, year-end reports, and public talks, side by side.
Argument Analytics
Every argument quantified: questions, words, and interruptions per justice — and how the “more questions means you lose” signal actually scored.
Decisions Database
9,378 decisions since 1946 (Spaeth) with opinion text, citation-network authority scores, and our early coding of the current term.
Court Analytics
78 terms in charts: ideological direction, 5–4 rates, overrulings, agreement heatmaps, and the median justice over time.
Research Data & API
Versioned CSV/JSON downloads with a codebook and citation guidance, plus a free public API — built for empirical researchers and journalists.
Our Approach
Spaeth Precedent
Matches case arguments to the Supreme Court Database, finds precedent cases
where current justices voted, and analyzes voting patterns across 75+ relevant cases.
Historical Voting Data
Sentiment Analysis
Classifies the tone of each justice's questions during oral argument.
Measures skepticism, hostility, approval, and other sentiments directed at each side.
AI-Classified Tone
ELP Question Counts
Epstein, Landes & Posner (2010): the party asked MORE questions by justices
tends to LOSE. Counts questions, words, and interruptions per side.
Computational (No AI)