Hello and welcome to World Business Report here on the BBC World Service.
I'm Rahul Tandon.
We're going to take you to South Korea and we'll also take you to the Netherlands.
Look at how political change there will affect both those economies.
But a new programme and a new tariff is in place.
Last week in front of a crowd of steel workers in Pennsylvania,
Donald Trump said that he'd put a 50% tariff on imports of steel and aluminium.
We are going to be imposing... a 25% increase.
We're going to bring it from 25% to 50% the tariffs on steel into the United States of America,
which will even further secure the steel industry in the United States.
Nobody's going to get around that.
So what has happened on Tuesday?
Here with the latest is our North of America business correspondent, Michelle Fleury.
You may recall that last Friday,
Donald Trump during a rally at a US steel plant in Pennsylvania where he campaigned during the election run,
he announced that he was going to double American tax on steel and aluminium imports from 25% to 50%.
Now he has signed that executive order,
making it official, and that goes into effect from tomorrow.
We know that the UK has an exemption that's going to remain at 25%.
Other countries don't.