Sen. Amy Klobuchar believes antitrust reform is what it will take to preserve what she calls American capitalism. The powerful chair of the Senate antitrust subcommittee has introduced and co-sponsored legislation that could alter liability protections for digital firms, put guardrails on health data use, require online political ad transparency and give publishers leverage in negotiations with tech platforms. And when she discusses her signature issue — antitrust reform — the Minnesota Democrat often links it to other concepts like data privacy, media industry fairness and even the first amendment. “Technologies are controlled by a handful of companies that have amassed unprecedented power,” said Klobuchar during her Jan. 29 State of the Net Conference keynote. Tech giants have control of “gateways over our personal data, power over what ads we see and what news we watch and monopoly power in key digital markets.”