There are avenues for appeal. Sometimes the United States Citizenship And Immigration Services suspects that clients are not in an executive capacity. Hence, pushback and the utilization of appellate resources are necessary to get a second opinion on a denial.
For reapplying, it depends on why they denied the application. If there’s an accusation of fraud, that is considered a challenging finding, which would bar someone from ever applying for any visa or immigration benefit with the United States government.