Trump reportedly tried to personally demand that the Postal Service double how much it charges Amazon
"[Postmaster General] Brennan and Trump have met at the White House about the matter several times, beginning in 2017, and most recently four months ago, the three people said. The meetings have never appeared on Trump’s public schedule."
“I think this particular issue is one that he comes at from his business background and understanding the dynamics of cost and delivery and overhead,” Rep. Mark Meadows (R-N.C.) said of Trump’s approach to the postal issue with Amazon. “And so . . . when you put all those components in there, it allows him to probably have a position on this that is deeper rooted in an understanding of a business model than perhaps some other presidents.”