North Dakota’s sole abortion clinic has filed a lawsuit against a new law that could force its closure. The measure says doctors providing abortions must have admitting privileges at a nearby hospital. On Wednesday, the Red River Women’s Clinic filed a court challenge calling the law unconstitutional. The clinic says its doctors will likely be unable to obtain privileges at the three local hospitals. One is for veterans, another is Catholic, and the third requires doctors to admit at least five patients a year. In 15 years of operation, the clinic has sent just one patient to the hospital in an ambulance. A similar measure threatening Mississippi’s only abortion clinic has been put on hold pending a final ruling.