U.S. Secretary Treasury Steven Mnuchin voiced his support for a new antitrust investigation into large U.S. tech firms on Wednesday, taking particular aim at Amazon.com Inc. during an interview with CNBC:

“ ‘I think if you look at Amazon , although there are certain benefits to it, they’ve destroyed the retail industry across the United States, so there’s no question they’ve limited competition.’ ” — Steven Mnuchin

Mnuchin compared Amazon AMZN, +2.49% unfavorably to Walmart Inc. WMT, +0.41% , another company that has been criticized for damaging small retailers. “People had those concerns about Walmart,” said Mnuchin, but “Walmart developed a business where small business could continue to compete with them.”