>have agreed on measures to potentially close or tighten the EU border
US flight ban took out the tourism industry. New migrant wave at the gate brings health issues as well as social issues that no one will accept. Tourism gone for years if they repeat 2015.
EU must have thought Trump would never pull the trigger because they thought it would hurt the US more. Trump must have solid economic data for US.
Defender Europe will guard US bases if the EU won't close the borders and there's nothing the EU can do about it. They also need a NATO Coast Guard in the Med.
Once Germany closes down all long haul trucking is in the tank. Not many east-west routes as it is, but almost all go trough Germany. Might be one Italy to France on the med coast, that's it. Waits at the border crossing will be atrocious.
Time for the Brussel's crowd to practice saying Please and Thank You, Mr. Trump in fluent NY English.