A group of student loan borrowers is asking a federal judge to enforce a $6 billion settlement they say the Biden administration has violated by missing a court-ordered deadline to cancel their debt. The Education Department had until Jan. 28 to discharge the loans, issue refunds and repair the credit of about 200,000 borrowers who say their colleges defrauded them, but at least 55,000 of those people are still awaiting debt cancellation. Attorneys for the borrowers filed a motion Tuesday for the court to intervene and order the department to promptly provide full relief to the group.