This as-told-to essay is based on a conversation with Michael Knox, co-owner of Toma Mojo Grill near Minneapolis. This story has been edited for length and clarity. I run a fast casual chicken restaurant in Richfield, Minnesota, a suburb just south of Minneapolis. With ICE agents in the area, I don't know when — or if — staff will be able to come to work. We all have pretty set schedules, and we're tight-knit. There are only six of us operating this place, seven days a week. And I have concerns: Are my employees going to get stopped on their...