The U.S. Department of Justice is challenging a Vermont law that requires public colleges to offer undocumented residents the same discounted tuition rates as other students who reside in-state. The DOJ has now sued 17 states, including Texas, where a judge last year struck down a law that had provided undocumented students in-state tuition since 2001. And at the University of Vermont, in-state tuition runs about $17,000, compared to nearly $47,000 for out-of-state students. Undocumented students can also qualify for expanded financial assistance under the law. It is unclear how many undocumented students currently attend Vermont colleges.