Well businesses closing and moving, has happened a considerable amount, and often to devastating effects to a community, so it seems like something that would be of real concern.
Realistically, how much would it hurt to move amazon warehouses near the border of any neighboring state?
The days of the factories, and none movable infrastructure a long gone, so it is a strong factor to consider.
It doesn't even have to be another state. It can be a few miles away: Fire all current employees because you're shutting down. Open the new place, hire new people.
I literally witnessed this threat first hand growing up when my mom was involved in union efforts.
