After only 275 patients in the initial study and not even peer reviewed is a pretty big risk to be taking with a president.
It has to be weighed against the risks of doing nothing.
Which would be an obese 74 year old, so around a 10-15% mortality rate. Possibly a 1 in 7 chance of death.
I think they'll risk a few side effects to potentially get that rate down, given who it is.
Or inject him with bleach, either/or.