(Portland, OR) -- Postal Service workers held a demonstration on Saturday outside of the East Portland Post Office to mark Postal Heritage Day. It's the 250th anniversary of the U.S. Post Office. They're opposed to President Trump's appointment of Waste Management CEO David Steiner as the new Postmaster General. They're concerned he wants to privatize the postal service. Outgoing Postmaster General Louis DeJoy slowed mail in rural areas, raised prices and merged processing facilities.