there's always Hoyt Axton's "The Gypsy Moth" which has a verse that runs :
" ... Many long years have come and gone since John F Kennedy died,
And I'm not sure for what that man was downright crucified,
But the same bad guys are still telling lies,
And you know they keep us used - and abused - they make us unhappy -
And everything they do gets us in trouble!

And river can rock ..."

sung wonderfully by one Jenny Fitzgibbon!!
Cheers!
R-J