Not quite a homonym, but close. Trump is a poultice poised to be Potus.
He is a poultice put on the body politic to draw out the poison. Whether or not that is his intention, it is the fact of his presence on us.
What he has drawn to the surface are various toxins isolated in a boil ready to burst. Election day is the lance. It would be an encouraging moment if he were to be shunned soundly on that day. But however unwittingly, he has done the country a great service by calling these elements to the surface.