University groups and labor unions filed a lawsuit in the U.S. District Court for the District of Massachusetts seeking to block a Trump administration rule that ends 'duration of status' for F-1 and J-1 visa holders, replacing it with fixed four-year study periods. Plaintiffs argue the rule undermines international students' contributions to U.S. campuses, economies, and national security. The lawsuit asks the court to vacate the rule before it takes effect.