Add trump to the mix and it was a totally insane traffic jam and logistics nightmare.

Reminded me of Star Wars The Clone Wars episode where all of the Jedi, leaders, and Senators from across the galaxy met for a huge conference. Count Dooku and the Separatists planned a terrorist attack using a Federation starship to ram the building.

In our own government, they have a "designated survivoe" who doesn't attend huge conferences for that very reason so there is always someone who can be in charge if the worst happens.

So, it is not like that kind of thing has never been considered.