The USA is a corporation. This corporation is made up of many companies both domestic and global. It is run by the law. The law of the sea and the law of the land. It strives on making a profit. By hook or by crook. Right now and in the past it relies on immigrants to do its dirty work. Say trucking. It does not like unions. Its all based on cheap affordable labor and law. That's why in the last election a lawyer and a businessman ran for CEO. Citizens want more money for their labor but immigrants will usually work for less wages. Uninsured as well. Citizens are a threat to it making a profit because they want more, insurance, larger wages, more comfortable life.