FIRST ON FOX: Former Treasury senior advisor and chief speechwriter Sam Lyman says the Southern District of New York's investigation into the finances behind the activist network tied to American Marxist businessman Neville Roy Singham marks one of the most significant developments yet in the federal government's scrutiny of the organization and far-left protests in the U.S."It's an enormous development because it's one of the first legal actions that's taking a deeper look into this network, which is among the most subversive political networks here in the United States, period," Lyman told Fox News Digital.Lyman was reacting to Fox News Digital's exclusive report that U.S.Attorney Jay Clayton from the Southern District of New York has opened a grand jury investigation into the finances behind Singham's sprawling activist network.The former Treasury official, who now serves as head of research at the Bitcoin Policy Institute, released a new report on Monday, first obtained by Fox News Digital, examining the Singham network's role in organizing opposition to artificial intelligence infrastructure and data center development across the country.DOJ LAUNCHES GRAND JURY PROBE INTO MARXIST MOGUL NEVILLE ROY SINGHAM'S FUNDING OF LEFTIST GROUPSResearchers conclude that about $23.6 billion in proposed AI and data center investment has been delayed, scaled back or blocked in campaigns where Party for Socialism and Liberation served as "a critical mobilizer in efforts that delayed, scaled back, or blocked the proposed AI infrastructure investment.""What we've uncovered is that Neville Singham's network, in particular the Party for Socialism and Liberation, has been boots on the ground in dozens of protests across the country targeting data centers," Lyman said.According to the report, the Party for Socialism and Liberation, which has emerged in the past decade as a key political and activist arm of the Singham network, has developed a nationwide organizing operation that has...