Rep. Ilhan Omar’s (D-MN) Democratic primary opponent won the endorsement of the United Steelworkers union. Don Samuels, 75, former Minneapolis councilman, has positioned himself as more of a centrist lawmaker, in contrast to the progressivism of Omar, who narrowly won the 2022 primary by just 2% in a race largely dominated by concerns over crime. Samuels’s chances in this race grew Monday when he won endorsements from United Steelworkers and the…