After three years spent trying to deter Russia from destroying Ukraine, European Union leaders grappled on Monday with how to respond to a major ally who appears determined to start a trade war or even seize part of their territory.

The president’s threats to slap duties on goods imported from the European Union are part of a pattern of directing the harshest penalties at the United States’ closest allies.

Feb. 3, 1:57 p.m. EST Trump announced the tariffs against Canada will be paused for 30 days, saying the longtime U.S. ally will implement a $1.3 billion border reinforcement plan that will bolster the U.S.-Canada border with “new choppers, technology and personnel... and increased resources to stop the flow of fentanyl.”