First challenge to prediction markets reaches Supreme Court

Supreme Court May Decide Whether Prediction Markets Survive in Their Current Form

Earthguardiansonline.com – The question of whether Americans can legally wager on the outcome of a basketball game, a presidential election, or tomorrow’s high temperature through platforms like Kalshi and Polymarket is now headed toward the nation’s highest court. New Jersey filed a petition on Wednesday asking the justices to order the shutdown of prediction-market operations within its borders, marking the first time this sprawling legal dispute has climbed to the Supreme Court. If the justices grant certiorari — a decision they are expected to weigh later this fall — a ruling could arrive by the beginning of next summer, potentially reshaping how billions of dollars in weekly trading volume flow through an industry that has exploded in popularity over the past several years.

What Prediction Markets Actually Are

Platforms such as Kalshi and Polymarket allow participants to buy and sell contracts tied to real-world outcomes: sports scores, election results, entertainment awards, meteorological readings, and a growing catalog of other events. Structurally, these are not casinos. They are organized as financial derivatives markets, and federal oversight falls to the Commodity Futures Trading Commission rather than to state gaming commissions. That distinction is precisely what makes the current litigation so contentious. A bipartisan bloc of 44 state attorneys general contends that the platforms are, in substance, unlicensed sportsbooks operating outside the consumer-protection frameworks and tax regimes that states have built over decades. Under that theory, prediction companies are siphoning billions in revenue that would otherwise flow to state coffers through regulated wagering.

New Jersey’s Multi-Year Legal Campaign

The state’s push dates to last year, when Attorney General Jennifer Davenport, a Democrat, moved to block Kalshi’s sports-betting operations within New Jersey. Kalshi responded with a lawsuit, and a federal district judge issued an injunction preventing the state from enforcing its regulatory action. The Philadelphia-based Third Circuit Court of Appeals then affirmed that injunction in a 2-1 vote in April, reasoning that prediction sites offer “event contracts” designed for trading and therefore occupy a legally distinct category from traditional sportsbooks, subject to exclusive federal regulation.

Davenport rejected that framing in a Wednesday statement accompanying the Supreme Court petition:

“We’re calling on the Supreme Court to resolve this issue and recognize that Congress did not silently make the sports-betting industry immune from state law.”

A Circuit Split Sharpens the Stakes

The New Jersey appeal arrived less than a week after a directly conflicting ruling from across the country. On Friday, the Ninth Circuit Court of Appeals issued a unanimous 3-0 decision in a Nevada-related case, holding that states may regulate prediction markets under their sports-betting statutes. The panel’s language was pointed: “Kalshi’s sports event contracts have the hallmarks of sports betting.” That holding collides squarely with the Third Circuit’s April decision, producing the kind of inter-circuit disagreement that typically draws Supreme Court attention.

The practical consequences are already visible. Regulators in three states — Nevada, Michigan, and Washington — have obtained court orders shutting down Kalshi’s operations, or at minimum its sports-betting vertical, within their jurisdictions. Kalshi remains the most widely used prediction platform in the United States, and together with Polymarket the sector now processes billions of dollars in weekly trading volume.

The Federal Government Takes Sides

The CFTC under Chairman Mike Selig, a Trump appointee, has positioned itself as the industry’s principal federal defender. Selig has publicly asserted that his agency holds exclusive jurisdiction over prediction markets and has championed their continued operation. The commission intervened in the Nevada case to argue that state laws cannot reach the platforms, and it has filed suits against several other states that attempted to ban prediction-site activity. In June, the CFTC proposed a package of new federal rules designed to preserve most of the existing industry structure, including the majority of sports markets. That proposal effectively rebuffed calls for tighter oversight coming from state officials, dozens of members of Congress, addiction researchers, and major sports organizations including the NCAA and the NBA.

Notably, the agency did not intervene in the New Jersey matter, leaving the state to press its argument before the Supreme Court without a federal friend-of-the-court brief on the industry’s side.

Political Entanglements Cast a Long Shadow

Overlooking any eventual Supreme Court deliberation is a web of financial and familial connections between the sitting president and the industry. Trump Media & Technology Group, the president’s social-media enterprise, announced last year that it would launch its own prediction-market product called Truth Predict, though those plans have been scaled back in recent months. Donald Trump Jr., the president’s eldest son, serves as an investor and adviser to Polymarket and as an adviser to Kalshi. A spokesman for Trump Jr. has previously stated that he does not lobby federal officials on behalf of either company.

Trump himself has spoken only sparingly about prediction markets. In April he remarked that “the whole world, unfortunately, has become somewhat of a casino,” a comment that drew attention given his family’s financial ties to the sector. In May he offered a more favorable characterization of the platforms, signaling the administration’s preference that they continue to flourish.

Why the Timing Matters

The convergence of a circuit split, a federal agency actively litigating against states, proposed rulemaking that would entrench the current regulatory architecture, and a president with direct family stakes in two of the largest platforms creates an unusual pressure environment for the Supreme Court. Whatever the justices ultimately decide, the ruling will determine whether 44 states retain the authority to impose consumer-protection rules, licensing requirements, and tax obligations on an industry that now moves billions of dollars every week — or whether the CFTC’s exclusive-jurisdiction model becomes the permanent framework for American event-based trading.