The Department of Justice on Thursday policies challenged that allow undocumented students to pay in-state tuition in four more states: Arizona, New Mexico, Oregon and Washington. The agency has now sued 21 states for allowing undocumented students to pay in-state tuition.

The Justice Department on Thursday filed lawsuits against four states over offering in-state tuition benefits to qualifying undocumented students.

The Justice Department filed lawsuits seeking to block laws in four states that allow residents without citizenship to qualify for in-state tuition and financial aid.