mail order

Withdrawal from conventions—especially in the form of old, established treaties always have unforeseen consequences and benefits mostly those that are positioned to take advantage of what happens at the margins, negotiating between those inside and outliers.  One knock-on effect of Trump’s announcement  last year that the US would be quitting the one hundred forty-four year-old Universal Postal Union of which almost every other country in the world is party to could result in severe delays (or expulsion of the community mail rooms altogether) for US military and diplomatic staff stationed overseas receiving packages and parcels just in time for the holidays and the shipping season.
America would reconsider if it can renegotiate terminal-dues in such a way that does not economically advantage China, but given the ill-will that the administration has already fostered with host countries with tariffs and even suggesting that nations should pay protection money for the privilege, it seems unlikely that any wants to talk terms with the US.