"That's what Rod Stewart did with 'Wild Mountain Thyme' or Shirley Ellis did all those years ago with 'Rubber Dolly'"

Jim does this "Rubber Dolly" use the tune of "Back up and Push" which comes from one part of a ragtime Piano piece called "Creole Belles" written by J. Bodewalt Lampe ?

If so do you consider it folk? Mississippi John Hurt was one singer that used to use this melody.