The story embraces neither the Grand Ole Opry building nor is it mentioned in the film: the only connection is a number of Grand Ole Opry regulars appearing in the film.
Plot
The film starts with the governor wandering into a duck hunt and getting killed.
The plot then revolves around a campaign to elect a new governor, candidates focussing upon a proposed Farmer's Bill.
The campaign speeches (and songs) are broadcast on the XYZ radio channel.
Candidates are disrupted by singing on a constant basis. Weaver proves the popular choice as he opts for Grand Ole Opry as the music of his campaign.