US President Donald Trump has suspended tariffs on small packages from China, after his sudden order ending duty-free treatment for shipments worth less than $800 left the US postal service and other agencies scrambling to comply.

UPS and DHL shipments are arriving with fees ranging from $20 to nearly $200, prompting Trump to temporarily reinstate a tax exemption for orders under $800.

The tariffs, which take effect Feb. 10, are most likely to hurt communities that voted for Trump, according to a study