I think one of the problems is how to define "a song in minor key".

Take the aforementioned "Eva's Polka" for example, the chords to its first verse are "Am - Em - Am - G - Em - Am", and the second verse "C - G - Em - Am - C - G - Em - Am".

So, does it become "a song in major key" if you put the second verse before the first verse? I don't think this is plausible.

Any idea?

Jason