The Constitution and tradition demands that it happen but, like so many other requirements, the Founding Fathers were too naive to be able to imagine that abuses and incompetencies beyond their ability to imagine would bring the whole system down. Criminal tendencies, ignorance and incompetence creating the perfect economic storm.
With, literally, no way out.
I predict the shortest SOTU speech since G. Washington:
"Things are not too good.
We are working on it.
The End."
Send the Repubs and a few dims to "shoe throwing 101 class"
And for those without shoes ...some barking lessons.