DOT regs. Federal requirement. If you're going long-haul you can't get around that.
Drilling companies won't hire a druggie, either. Most companies which have jobs involving moving expensive equipment won't either.
The list is long, but there is no Right to work somewhere if you are a drug user. (I suppose they'll sue for that next.)
In which case, more productive industries will leave states like the gun manufacturers are leaving anti-gun states. Insurance costs and liability profiles will mandate it.
Yeah, I thought as much. It’s all part of the plan.