I’d give Bush 41 a pass due to age and infirmity. Bush 43 should attend. Carter is clinging to relevance, Clinton similar although probably some butt-hurt.
I didn't expect GH Bush
Again Trump has all the Right Enemies
Concur on Bush 41, he’s been seriously declining recently.
That said, if he’s not got long for the world, 43 ay be staying with him. That’s one situation that I would want to know more about before passing judgement. If my father was likely to die any day, I’d sure stay with him rather than go to an event like this.