By Nana 
The National Football League has thrown its substantial weight behind New Jersey state officials in an escalating legal battle, urging the United States Supreme Court to take up a high-stakes case concerning sports betting through prediction market platforms.
In an amicus brief filed with the nation’s highest court on Wednesday, the NFL formally called on the justices to grant a petition for a writ of certiorari filed by New Jersey Attorney General Jennifer Davenport and gaming enforcement interim director Mary Jo Flaherty. The legal maneuver represents the latest flashpoint in an ongoing conflict over whether the regulation of prediction market companies falls under the authority of individual state gaming commissions or federal financial regulators.
The case stems from New Jersey’s ongoing legal friction with Kalshi, a prominent prediction market platform, over event contracts tied to sporting outcomes. The league’s filing aligns closely with the core arguments advanced by New Jersey authorities, emphasizing that the legal gray area surrounding prediction markets poses serious risks to both consumer protection and the overarching integrity of professional sports.
Highlighting the massive scale of the financial activity centered around its games, the NFL cited stark market data in its filing. According to the league, on the very first Sunday of the recent football season, more than half of all trading volume across prediction markets—amounting to roughly $1.8 billion out of a total $3.3 billion—was directly related to NFL events.
The football organization argued that many of the event contracts offered on Kalshi and similar platforms are inherently problematic and exceptionally vulnerable to manipulation. Because these platforms allow individuals to buy and sell contracts based on specific future occurrences, the NFL contends they create unprecedented vulnerabilities that traditional, heavily regulated sportsbooks do not present in the same manner.
According to the league’s amicus brief, these types of speculative bets pose the absolute greatest threats to game integrity because a single person with insider knowledge or direct involvement could potentially alter an outcome. The filing pointed out several scenarios where a compromised participant could shift results, noting that a player could subtly alter their performance, a coach could adjust a team’s lineup strategy to influence a statistic, or a game official could intentionally make or withhold specific calls to swing a market.
Beyond the immediate concerns over manipulation, the NFL also trained its focus on what it characterized as a severe lack of sensible safeguards governing event contracts approved by the Commodity Futures Trading Commission. The league argued that preempting state-level authority in favor of federal oversight by the CFTC represents a major legal question that warrants direct review and clarification by the Supreme Court.
As of Thursday, the Supreme Court has not yet indicated whether it intends to grant a review of the case. Meanwhile, Kalshi has been granted a formal extension to respond to New Jersey’s initial filing, giving the company until November 9 to address complex legal issues surrounding federal versus state jurisdiction, the manipulable nature of certain event contracts, and the adequacy of consumer protections.
States Want Clarification From SCOTUS on Prediction Markets
The NFL is far from alone in its push for judicial intervention. On the same day as the league’s filing, a broad coalition consisting of 39 US states and the District of Columbia submitted their own joint amicus brief strongly supporting New Jersey’s position. This coalition warned the Supreme Court that the persistent jurisdictional conflict between the CFTC and state gaming regulators has devolved into a chaotic national turf war that cannot be resolved without a definitive ruling from the highest court in the land.
The multi-state filing cautioned that allowing the dispute to linger without judicial guidance would only encourage further escalation between federal and state entities. The ongoing power struggle between the states and federal regulators highlights a deeply troubling level of unpredictability regarding which laws apply and to whom, creating an unstable regulatory environment for both consumers and operators.
The states’ brief urged the Supreme Court to step in promptly to resolve the existing circuit split, offer clear guidance to lower courts, define the true boundaries of the CFTC’s authority, and finally provide a badly needed answer to the central legal question at hand.
The debate underscores a fundamental clash in regulatory philosophy. Speaking to Cointelegraph following New Jersey’s initial petition in September, Kalshi spokesperson Dani Lever argued that prediction market platforms simply cannot function efficiently or effectively if they are forced to navigate a fragmented landscape governed by 50 different state regulators.
While New Jersey officials were the vanguard in petitioning the high court to review the Kalshi case, the broader landscape is littered with similar state-level regulatory actions and enforcement efforts against prediction market companies. These localized disputes could easily wind their way through the appellate system, keeping the pressure on the federal judiciary to establish a unified framework. Whether the Supreme Court justices will ultimately choose to step into the fray and decide the future of prediction market regulation remains to be seen as the November briefing deadlines approach.
Sagoh 
Basiran 
Nana Wu