U.S. antitrust enforcers are intervening early to examine whether a handful of big tech companies such as Nvidia are using their leverage to establish dominance over the burgeoning artificial-intelligence market. The Justice Department’s antitrust division has already contacted Nvidia, whose AI chip market share is estimated at over 80%, to ask questions about the terms of its contracts and partnerships, according to people familiar with the matter. Source: Nvidia Draws Antitrust Scrutiny as Enforcers Signal Early Interest in AI