(Bloomberg) -- The chairman of the top US energy regulator has put America’s biggest power grid on notice, warning that its operator may be too big to function adequately amid the AI data center boom.Most Read from BloombergInside a Year of Chaos and Conflict at Kevin Hart’s Media CompanyAmbani’s Cola War With Coke, Pepsi Spurs Fridge Bonanza in IndiaIran Makes New Offer on Uranium in Response to US, WSJ SaysNvidia’s CEO to Miss China Trip After Year of Travels With TrumpLaura Swett, who oversee