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This is the World In Brief from The Economist.

Our top stories.

President Donald Trump's baseline levy of 10% on all imports came into effect on Saturday.

Higher reciprocal rates on countries which, in his view, have treated America unfairly,

will kick in on April 9th.

Earlier, Jerome Powell, chair of America's Federal Reserve,

warned that the tariffs would spur inflation and slow economic growth.

Businesses reeled from the tariffs.

Jaguar Land Rover, an Indian-owned British carmaker,

said it will pause all shipments to America for a month while it considers the levy's impact.

On Friday, markets plunged after China retaliated against Mr. Trump's tariffs,

...