I own a home health care agency in 15 states, software company, roofing company and real estate. I see the broad range of employment. My father was an immigrant. My mother is a descendant of the mayflower.
And I disagree that it has been show in har foreign labor depreciates domestic labor. In fact economic research has shown the opposite. If that were the case then we should make it illegal for people from West Virginia and Idaho to migrate to New York or SF.