United States entry requirements are the same in all states, with most foreign travelers requiring a visa. There are exceptions as Canadian citizens only need proof of that citizenship. Travelers coming to the U.S. for tourism or business for 90 days or less from qualified countries may be eligible to visit the U.S. without a visa.
For the latest information, including required documentation, any interested party should apply at the American Embassy or Consulate with jurisdiction over their place of permanent residence. In addition, we strongly recommend visiting the U.S. Department of State's visa website page