There is a rather peculiar situation with Irish political music - the Republicans mostly use Scottish or English tunes (thanks to the 19th century balladeers, who pastiched standard broadside material) while the Protestants use indigenous Irish ones (song airs and pipe tunes from the late 1600s to 1800; the fiddle came along after).

Irish trad song to Orange flute band march to Pogues number to alt-country sounds like a pretty plausible process.