I was thinking of the "Sister Cities" relationships so many American cities have with cities in foreign countries.
The next step could well be a push to extend American voting rights to residents if "Sister Cites" around the world.
Philadelphia (for example) has the following "Sister Cities":
Florence, Italy
Tel Aviv
Torun, Poland
Tianjin, China
Nizhny Novgorod, Russia
Just to sum up, in my opinion, Liberals are in need of psychiatric help 24/7.