Border G-Man (1938)

Government agent Jim Galloway is sent undercover to investigate shifty businessman Louis Rankin for violations of the Neutrality Act, a law forbidding the exporting of troops and war materiel to foreign countries. After hiring on as Rankin's new take-charge foreman, matters become more complicated as Galloway learns that Rankin has used Rita, his vampish girl friend, to dupe the governor's son into becoming partners in Rankin's schemes, which Rankin could later use to blackmail the governor, should the need arise.