As an obese 74-year old man who may have, or have had, heart issues or other pre-existing conditions, President Trump is at significantly higher risk from Coronavirus than someone in great health in their early-20s.
3%-4% of people his age who catch coronavirus go on to die from it, but this includes people in far worse health, with less access to exceptional healthcare and whose diagnosis came much later.
The most likely outcome by a considerable margin is that he will have few or no symptoms and that he will go on to make a full, or near full, recovery.
IMO anything short of death will be portrayed by the GOP as a miracle and death will be presented as President Trump giving up his life for his country. IMO the Democratic Party should rebut this.
If he dies, they should offer their deepest sympathies and so on but go on to say that the best way to fight off Covid-19 is to not catch it in the first place and that this is a bleak reminder for people to mask up, observe social distancing and observing good hygiene.
If he survives they should offer their congratulations but then remind people that he has access to healthcare that most Americans cannot even dream of and that he only has himself to blame for catching it in the first place.