The U.S. Postal Service Detroit Network Distribution Center in Allen Park. July 15, 2026. | Photo by Katherine Dailey/Michigan Advance. In a letter sent late Wednesday to U.S. Postmaster General David Steiner, U.S. Reps. Debbie Dingell (D-Ann Arbor) and Rashida Tlaib (D-Detroit) demanded answers about working conditions at the Allen Park U.S. Postal Service facility where a worker died in November 2025. They say staff, supervisors and union rep…