Consumer groups are expected to file a federal lawsuit today challenging U.S. Education Secretary Betsy DeVos’s so-called partial relief rule, in which more students get only a part of their student debt forgiven if they have been defrauded by their institutions.

The rule DeVos announced in December was a significant departure from the Obama administration’s approach, which had been to grant full relief to borrowers, including thousands of former Corinthian Colleges students who sought to discharge their student loans after the collapse of the for-profit chain in 2015.