This 1943 movie is a free-to-me Amazon Prime streamer. Decent IMDB rating. I didn't care for it much.
Frank Morgan, the Wizard of Oz himself, plays SCOTUS justice John Josephus Grant. Who, as the court's session winds up, wants nothing more than to take off to the wilderness and shotgun some ducks. But before he can murder a single bird, he's waylaid by the local sheriff, who shakes him down for a town hunting license. It's clearly implied that this fee will not go to schools or road repair, but instead straight to the pockets of the town's ruling class. But when the cop asks for additional cash for his trouble, Grant draws the line and finds himself in jail.
He embarks on a project to rid the town of its corrupt political establishment, without revealing his Washington job. This involves his straitlaced secretary, who (despite her better judgment) gets involved with the inept-but-honest lawyer who's running for mayor against the crooks.
The acting is … not good.
For some reason, Amazon appends "Classic Hollywood Crime Movie" to the title. You'd expect at least some gunplay, maybe a murder or two. Unfortunately, it's just the ducks that get killed.