The President of the United States and the Honorable Bill Clinton

[QUOTE=I Love Me, Vol. I]
Former presidents are also just ‘presidents’, even if they are not THE president. And they are ‘President’ if you are using it as a title and/or to precede their name. A teacher would say: “name all the presidents, Suzy.” Rather than, “name all the former presidents and the current one, Suzy.”

I could be sooooooooo wrong about this, but it feels right to me.
[/QUOTE]

It seems good enough for casual settings, but I think the OP was more concerned with hyper-formal settings, like when the first couple is being announced by the Royal Crier to the Queen of England and Parliament, or some similar event.

Considering what the last few presidents have done to the world, “a murder of presidents” must be considered correct in at least one way.