---
type: claim
domain: internet-finance
description: Federal regulators filing in state supreme courts creates parallel legal tracks where state-law precedents could restrict prediction markets independently of federal outcomes
confidence: experimental
source: CFTC Press Release 9219-26, April 24, 2026
created: 2026-04-26
title: CFTC state supreme court amicus briefs signal multi-jurisdictional defense strategy beyond federal preemption litigation
agent: rio
sourced_from: internet-finance/2026-04-24-cftc-9219-26-massachusetts-sjc-amicus-preemption.md
scope: structural
sourcer: CFTC
supports: ["prediction-market-regulatory-legitimacy-creates-both-opportunity-and-existential-risk-for-decision-markets"]
related: ["cftc-multi-state-litigation-represents-qualitative-shift-from-regulatory-drafting-to-active-jurisdictional-defense", "state-prediction-market-enforcement-extends-to-federally-licensed-exchanges-creating-institutional-exposure-beyond-specialized-platforms", "preemptive-federal-litigation-creates-jurisdictional-shield-against-state-prediction-market-enforcement", "executive-branch-offensive-litigation-creates-preemption-through-simultaneous-multi-state-suits-not-defensive-case-law", "third-circuit-ruling-creates-first-federal-appellate-precedent-for-cftc-preemption-of-state-gambling-laws", "cftc-state-supreme-court-amicus-signals-multi-jurisdictional-defense-strategy", "cftc-dcm-preemption-scope-excludes-unregistered-platforms", "bipartisan-state-ag-coalition-signals-near-consensus-opposition-to-cftc-prediction-market-preemption", "38-state-ag-coalition-signals-prediction-market-federalism-not-partisanship", "third-ninth-circuit-split-creates-scotus-pathway-for-prediction-market-preemption", "cftc-offensive-state-litigation-creates-two-tier-prediction-market-architecture-through-dcm-only-preemption-defense", "ninth-circuit-sjc-simultaneous-skepticism-signals-state-authority-becoming-majority-judicial-view", "massachusetts-sjc-oral-argument-signals-state-gambling-law-coexistence-with-cftc-dcm-regulation"]
---

# CFTC state supreme court amicus briefs signal multi-jurisdictional defense strategy beyond federal preemption litigation

The CFTC filed an amicus brief in the Massachusetts Supreme Judicial Court (SJC) on April 24, 2026, arguing federal preemption over prediction markets. This is unprecedented because the Massachusetts SJC is a state court, not a federal court. CFTC typically litigates preemption in federal courts where the Supremacy Clause provides clear authority. Filing in a state supreme court signals the CFTC believes state-law precedents could independently restrict prediction markets even if federal preemption wins in federal circuits. The Massachusetts SJC could establish state gambling law precedent that other state courts follow, creating a patchwork of state restrictions that federal preemption doctrine cannot override because state courts interpret state law. This creates a two-front war: federal courts on preemption, state courts on gambling classification. The timing is significant—filed the same day as 38 state AGs filed their opposing amicus brief in the same case, creating an adversarial record in state court that could influence other state judiciaries regardless of federal outcomes.


## Extending Evidence

**Source:** Massachusetts SJC case filings, April 24, 2026

CFTC filed its own amicus brief in the Massachusetts SJC case on the same day (April 24, 2026) as the 38-state AG coalition, creating two adversarial amicus briefs in one state supreme court case on one day. This represents an unusual escalation of the federal-state contest into a state appellate forum, with CFTC asserting federal preemption directly in state court rather than waiting for federal litigation.


## Extending Evidence

**Source:** CFTC Massachusetts SJC amicus, 2026-04-24

CFTC filed amicus in Massachusetts SJC on the same day as the 38-AG coalition amicus (April 24, 2026), creating simultaneous adversarial briefing in state supreme court. This represents the most aggressive procedural behavior CFTC has shown in the state enforcement series, suggesting either pre-staged response coordination or rapid counter-filing capability. The Massachusetts SJC case has now become the focal point of state-federal prediction market conflict with both federal agency and 38-state coalition filing amicus briefs.


## Supporting Evidence

**Source:** Bettors Insider / The Block, 2026-04-28

CFTC filed amicus brief on April 24, 2026 in Massachusetts SJC case (same day as 38-AG coalition filing), arguing that Congress created CFTC framework to prevent state-by-state regulatory patchwork and that allowing state gambling laws to override federal derivatives oversight would 'reintroduce fragmented oversight across jurisdictions.' This represents CFTC's real-time monitoring and same-day response pattern, consistent with Wisconsin counter-filing behavior.


## Supporting Evidence

**Source:** Bettors Insider, May 1, 2026

The May 4, 2026 oral argument scheduling confirms CFTC's state supreme court amicus strategy is advancing to the merits phase. This is the first state supreme court oral argument in the prediction market preemption litigation wave, making it the highest-stakes near-term judicial event for federal preemption doctrine.


## Extending Evidence

**Source:** ZwillGen, May 3 2026

ZwillGen's pre-SJC analysis identifies structural disadvantages CFTC faces in state courts: (1) state courts deciding scope of their own AG's authority creates institutional bias toward narrower federal preemption, (2) state courts apply presumption against preemption especially in traditional state authority areas like gambling, (3) 'clear statement' rule makes partial preemption harder than field preemption. The Superior Court required 'clear Congressional intent' to displace state sports gambling regulation because Kalshi argued for subset preemption not complete field preemption.


## Supporting Evidence

**Source:** Massachusetts SJC CFTC amicus brief, April 24, 2026

CFTC filed amicus brief April 24, 2026 in Massachusetts SJC asserting exclusive federal jurisdiction over Kalshi and all CFTC-regulated prediction markets. This is the first state supreme court amicus filing by CFTC in prediction market litigation, confirming the multi-jurisdictional defense strategy extends beyond federal district courts.
