Sixteen Latin American and Caribbean countries have asked to join in the Justice’s Department’s lawsuit against South Carolina’s new illegal immigration law, citing concerns for their citizens. Brazil, Chile, Ecuador, Honduras, Mexico and other countries filed papers Tuesday, asking to join the litigation in Charleston. The law would require law officers who make a traffic stop to call federal immigration officials if they suspect that someone is in the country illegally. Opponents say the measure would encourage racial profiling. The countries say the law would lead to state-sanctioned discrimination against their citizens.