State AGs are among the most frequent participants in U.S. Supreme Court cases.
In addition to serving as direct parties in lawsuits, AGs frequently file amicus curiae (“friend of the court”) briefs in prominent cases. This activity has become more common over time, both at the certiorari and merits stages of Supreme Court cases.
Areas of recent interest to coalitions of AGs include immigration, civil rights, gun policy, antitrust, criminal justice, and more. The increase of amicus filings in highly contested policy areas has accompanied a sharp increase in the partisan nature of the AG coalitions filings these briefs, and the chart to the right indicates.
You can explore this amicus activity at the links below.
This information will be updated as AGs file new multistate amicus briefs at the U.S. Supreme Court.
A listing of multistate amicus curiae briefs filed at the U.S. Supreme Court from 1980 to the present. The table is fully searchable, and provides additional information about each case as well as links to the briefs (if available).
Additional charts and aggregate totals concerning these multistate amicus briefs, providing a visual overview of this activity.
An explanation of which cases are included in the totals, as well as how the data was collected.