1) They leave and become another country
2) They have tariffs placed on all products and services that they export
3) We tax the electricity that they import from the US
4) The Ports of Portland and Seattle expand
5) A wall is built to keep fleeing ‘leftists’ inside this new country
6) Soon they will not be able to feed themselves and will ask the UN for assistance
7) We all rejoice that Republican Presidents will control the country for decades.
Not necessarily.
If Northern California breaks off into the Conservative right to work state of Jefferson, then it's ports at Eureka would probably boom.
Companies would start to choose Eureka to avoid Portland & Seattle where the long shore unions are in control.