Donald Trump has threatened to slap import tariffs on the EU.
The US President has already slammed neighbours Canada and Mexico with levy hikes - and both quickly returned the favour.
Holding his first Cabinet meeting, Trump says it will be 25 percent generally speaking, and mentioned cars as one target.
He also claimed the EU formed to 'screw with the US'.
UK correspondent Enda Brady says Starmer will be looking to make sure the UK avoids a similar fate as he heads to Washington.
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