A decision by President Trump to close a tariff loophole could change the landscape of online shopping, particularly for the Chinese e-commerce companies behind wildly successful sites, such as Shein and Temu.

President Donald Trump’s sweeping tariff threats have been touch and go. As it stands currently, the 25 percent tax on goods from Mexico and Canada is on ice for a month, but a 10 percent tariff on Chinese goods is set to take effect on Tuesday, via an executive order of questionable legality.

Donald Trump's last trade war with China allowed Shein and Temu to become e-commerce giants during a cost-of-living crisis. But his latest tariffs will not hurt the companies as much as those who rely on them.