A shipping loophole exempting small-value packages from tariffs ended at 12:01 a.m. Friday, meaning that packages shipped into the U.S. under $800 are now subject to additional taxes.

Earlier this year, President Donald Trump ended the loophole for small-value packages shipped from China and Hong Kong.

Senior White House officials hailed the move in a call with reporters Thursday, saying that it was a crucial step in Trump's efforts to rebalance trade and also will help crack down on the importation of illegal goods, including fentanyl.

Peter Navarro, senior counselor to the president for trade and manufacturing, said ending the "deadly de minimis loophole" will add up to $10 billion in tariff revenues and help "save thousands of American lives by restricting the flow of narcotics and o

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