The United States will begin withdrawing from the Universal Postal Union, a United Nations treaty that lowered rates for foreign postal deliveries in the United States, senior White House officials said on Wednesday.

The White House said the treaty enables foreign postal services to take advantage of cheap shipments to the United States, especially China, creating an unfair cost advantage over U.S. companies that ship goods, and hurting the income of the U.S. Postal Service.

"People are getting hurt in this country by an unfair system," one official told reporters on a conference call.

The move is the latest by President Donald Trump's administration to distance itself from international multi-lateral organizations and accompanying policies that it feels are hurtful to the United States.