I would be curious to see the timeline if he did kick the bucket or otherwise get taken out of play at this juncture. As it stands it will probably be reasonably fun -- at his age and weight I can't imagine this will be a quick recovery and so much does depend upon how you look and your appearance of health (they have known that for about 60 years at this point
https://constitutioncenter.org/blog/the-debate-that-changed-the-world-of-politics ). Probably got some good uppers, choice camera shots and whatnot though to fake it as and when, and posting silly one liners from a phone (or having someone else do it) is not too demanding. If this last run up to the big day is already looming and whatever feelings people have will be cemented during it then yeah.
If the democrats had such a hard time finding a suitable candidate (and arguably still failed) I can only imagine the last minute arrangements the other guys would have to pull here.
Rino takeover, neocons re establish, religious types return to the fore, did he truly change the party long term and thus someone else in his mould, libertarian?
Re: "untested"
In what regard? Such things have been a protocol for quite some time in a lot of different things, and have a pretty substantial basis behind them. Whether this particular concoction is that good (and I can only imagine the protocols in place here for treating el presidente, indeed I would be shocked if they did not have a nice recovered victim of otherwise matching whatever you need matching in these scenarios waiting in the wings as it were) I would say it has a basis in reality, unlike huffing or shooting bleach and random not even previously noted as being antiviral medicines.