Actually it would be governor of some Southern state, specifically Louisiana. Jimmie Davis wrote You Are My Sunshine in 1940 and served two terms as governor, in 1944 and again in 1960. He is 99 years old now; his birthday is September 11. I don't suppose that the song hurt his campaigning, though.

As to disputed authorship, look at the Oklahoma Hills story. Who wrote it depends on who you were talking to, but it seems pretty clear that both Woody Guthrie and Jack Guthrie should share the credit, as they (eventually)did the royalties.