Gaming State Lawmakers Urge SCOTUS Review in Kalshi Dispute

State legislators have filed an amicus brief supporting New Jersey’s request for the Supreme Court to review a case involving Kalshi, aiming to clarify state authority over prediction markets. The National Council of Legislators from Gaming States contends a ruling for Kalshi could undermine state regulation of sports betting and related activities.

What Happened

US state lawmakers, represented by the National Council of Legislators from Gaming States (NCLGS), submitted an amicus brief to the Supreme Court on Tuesday. The brief supports New Jersey’s Attorney General and gaming authorities in their petition for a writ of certiorari, requesting the Court to consider a legal challenge against Kalshi, a prediction market platform, according to Crypto Breaking News.

The core issue involves determining whether state gaming regulators possess the authority to oversee platforms offering event-based contracts tied to sports and other outcomes. New Jersey’s petition, filed on September 2, seeks clarification on the balance between state regulatory powers and federal oversight regarding prediction markets, as reported by Law360.

Key Details

• NCLGS filed an amicus brief supporting New Jersey and state gaming regulators in their dispute with Kalshi over prediction-market activity, according to Crypto Breaking News.
• The lawmakers argue that a ruling favoring Kalshi would effectively render states “powerless” to regulate prediction-market sports betting within their borders, as stated in the brief cited by Crypto Breaking News.
• The brief warns that any preemption ruling could necessitate broader changes to the regulated gaming landscape across US jurisdictions, according to Crypto Breaking News.
• The dispute originated from New Jersey’s appeal following a decision by the US Court of Appeals for the Third Circuit, as reported by Cointelegraph.
• Kalshi has until November 9 to file its official response to the Supreme Court’s certiorari petition, according to Crypto Breaking News.

Why It Matters

The case centers on jurisdictional authority: New Jersey and gaming authorities are asking the Supreme Court to determine whether state governments or federal agencies hold the legal authority to regulate prediction-market platforms operating through event contracts. The NCLGS argues that if state regulation of Kalshi’s activities is limited, states would lose the ability to establish rules for how such products are marketed and offered, potentially causing “substantial harm and confusion” by undermining existing regulatory frameworks, according to Crypto Breaking News.

The NCLGS brief also emphasizes potential ripple effects throughout the US gaming industry. It contends that if Kalshi’s products are deemed beyond state regulation, other highly regulated operators, such as casinos and pari-mutuel businesses, might seek to restructure their offerings for similar legal treatment. This could compel states to reconsider existing regulatory regimes governing “vice activity” if federal preemption is established in this area, potentially increasing compliance costs and altering product design strategies for companies in regulated gambling ecosystems, as reported by Crypto Breaking News.

What’s Next

Kalshi has not yet submitted an official response to the certiorari petition. The company is expected to file its brief outlining its position by November 9, according to Crypto Breaking News. A Kalshi spokesperson previously stated to Cointelegraph that the platform “could not be regulated by 50 different regulators,” highlighting a central argument in prediction-market regulation debates regarding fragmented state regimes versus local oversight.

Originally reported by Crypto Breaking News·Published 23 Sep 2026, 21:12