The Ritchie family's "Old Woman and the pig" -- I'm sure this could be adjusted quite successfully in light of recent events. The line about it being the "prettiest pig" seems particularly appropriate!

There was an old woman and she had a little pig
Didn't cost much 'cause it wasn't very big

The little old woman kept the piggy in a barn
Prettiest pig on the whole damn' farm

The little old woman fed the piggy on clover
It fell down and died all over

The little old woman she died of grief
Wasn't that a sad relief

The little old man he cried and cried
Then he too lay down and died

That was the end of the one two three
The man and the woman and the little piggy

The good book lies upon the shelf
If you want any more you can sing it yourself