The Justice Department says it will be monitoring South Dakota's Tuesday primary election vote in Shannon County, on the Pine Ridge Indian Reservation.
The agency says it will be checking to make sure federal voting rights laws are being obeyed. They prohibit election discrimination based on race, color or inability to speak English.
The Justice Department says Shannon County has to provide language help for any American Indian voters in the county who may need it.
In a statement, the Justice Department says it will also be monitoring elections in Wisconsin, California and New Mexico on Tuesday, to ensure compliance with federal voting rights law.