Speaking to reporters at JBA on Tuesday, President Trump dismissed economic concerns about secondary tariffs on Russia.

The US President will also meet First Minister John Swinney during the private trip to Scotland later this month.

Oil prices settled down on Monday by more than $1, as investors weighed new threats from U.S. President Donald Trump for sanctions on buyers of Russian oil that may affect global supplies, while still worried about Trump's tariffs.

Trump's threat against Russia runs parallel to a Senate-led effort to pass crippling sanctions on countries that buy Russian energy.