The Justice Department and the FTC are investigating tech giants like Nvidia over their dominance in the AI market. With over 80% of the AI chip market, Nvidia is being questioned regarding its contracts and partnerships. The investigation is still in its early stages and may result in subpoenas if necessary. The FTC also examines investments by companies such as Microsoft, Amazon, and Alphabet in AI startups, raising concerns about potential monopolies. Antitrust leaders fear large firms could gain control of critical AI sectors, stifling competition and innovation.