Just after the movie begins,Jean Arthur announces to the Army officers that she is the representative of Iowa's 9th Congressional District. The movie was shot, and set, after the end of WWII in 1945. Iowa's 9th District was eliminated by redistricting after the 1940 Census, and ceased to exist after the representatives elected in 1942, the first elections with the redrawn 8 districts, took office at the beginning of 1943. This error may have been by intent to avoid connecting her to a real postwar district.
Though the character played by Jean Arthur is an 'unmarried' American Congresswoman, the actress's real life wedding ring is visible in many scenes especially close-ups during the latter part of the film.