Democrat John Tanner has represented Tennessee’s eighth district in Congress since 1989. The last time he faced serious opposition was 1994. He ran unopposed last year and won 99.97 percent of the vote. He is the epitome of a longtime, well-known, well-established Democratic Blue Dog with a wide-ranging network of connections and supporters.

Stephen Fincher is a farmer and gospel singer who has never lived outside of the perfectly named Frog Jump, Tenn. His biography prominently mentions his work as a Little League coach and performances in the family singing group since age nine. He is the epitome of a not-well-known, non-traditional, unlikely political candidate and longshot challenger.

Last quarter, Tanner raised $62,000. The gospel-singing farmer who’s never run for office before raised . . . $300,000.

Put this race on your must-watch list.