These are the legal way to enter the USA; 1. Be a child or a parent grandparent of a natural born citizen 2. Work visa , which is reserved for people with specialization in fields, heart nurses, drs, teachers and higher. 3. Be accepted to university on a student visa. 4. Temporary visitor, can stay for 6 months. 5. Get engaged 6. Get married Every one of these have different rules and lengths of time for processing. All are costly, it cost me $10,000 In 1997.