[US Department of Justice and CFTC Sue Arkansas Attorney General to Establish Federal Regulatory Priority] The US Department of Justice and the CFTC have filed a lawsuit against Arkansas Attorney General Tim Griffin, seeking to block the state's enforcement action against the prediction market platform Kalshi and to prohibit future state-level actions against prediction markets regulated by the CFTC. The Department of Justice and the CFTC argue that prediction markets regulated by the CFTC should be uniformly governed by federal rules, and that separate enforcement by each state creates regulatory fragmentation. In late October, Utah filed criminal charges against Kalshi and its two co-founders. Earlier this month, Polymarket and OG.com filed a lawsuit in federal court against Arkansas over enforcement actions. Kalshi is applying to the CFTC for more futures products, including crude oil and stock indices. (Source: The Block)