Explained: Why Trump is trying to use tariffs to change world tradepublished at 08:26 British Summer Time 29 May

By raising tariffs on goods entering the US, Trump says he can encourage domestic manufacturing and US consumers to buy more American-made goods, raise tax revenues, and address what he claims are unfair trade practices by other nations.
The US has a trade deficit - meaning it buys more than it sells - and Trump has long argued that this is harmful for the country.
Many of Trump's claims about the impact of tariffs have been contested, and experts have warned that because tariffs are additional taxes, they will increase the price of goods for US consumers.
It has also been argued that tariffs are a negotiating tactic, and that the mere threat of them will mean other countries make trade or other concessions to the US in order to avoid them.
That's because, even though the US importer will pay the tariff, the increased cost makes it likely fewer goods will be sold, which ultimately will be bad for business for those selling into the US market.
This court ruling now casts Trump's strategy into uncertainty.