Trump has personally pushed U.S. Postmaster General Megan Brennan to double the rate the Postal Service charges Amazon.com and other firms to ship packages… a dramatic move that probably would cost these companies billions of dollars,” the Washington Post reports. “Brennan has so far resisted Trump’s demand, explaining in multiple conversations occurring this year and last that these arrangements are bound by contracts and must be reviewed by a regulatory commission… She has told the president that the Amazon relationship is beneficial for the Postal Service and gave him a set of slides that showed the variety of companies, in addition to Amazon, that also partner for deliveries.”