He won't be F5ing the page himself, nor will he be typing in answers, so I'm sure answers will just appear as and when his staff are able to post them.

I was just discussing this with colleagues, maybe he gets access to a special page where he can answer questions without going through the standard load balancer/database stack.

At least, that's what I would do if I had some as high profile as the US president using a site that would get slammed HARD.