Amazon is asking that the new head of the Federal Trade Commission step aside from antitrust investigations into the e-commerce giant, contending that her past public criticism of the company’s market power makes it impossible for her to be impartial.Amazon is asking that the new head of the Federal Trade Commission step aside from antitrust investigations into the e-commerce giant, contending that her past public criticism of the company’s market power makes it impossible for her to be impartial.