It is a poem, not a song. As best I can remember, it goes like this:

MIDWESTERN HEART
(poem by Claudia Schmidt)

Midwestern heart. Big, ornery thing. Beating away in the chest.
Steadfast as Midwestern weather is.
Loves too hard, laughs too much.
Sometimes doesn't laugh enough.
Moralistic, masochistic, Honest.
It throbs to simple fun.
Dress it up in spats and tails
And watch it do the foxtrot around the world.
It resonates the rolling meadows, lush landscapes, everything.
It wishes cows could be wild again.
Afraid of heights, it will tickle the tops of mountains right where it lies.
Beating away in the chest.
Big ornery thing.
Midwestern Heart.