Current Immigration Policy and their Contradictions

Over the years, it has been thought that people belong to one country and should stay there. Immigrants would migrate to the United States with minimal limitations until mid-20th century law and policy changed the rules of the land. What are these rules today? The determination of who can and can not enter changes with every new presidential administration. As immigration continues to grow, it is vital to develop a better, more firm, and more clear policy.