But what about murder? What about conspiring with multiple foreign powers to subvert and distort popular democracy?
on your example, walking out of the whitehouse shooting a small child in front of the cameras (assuming that no Secret Service Agent wouldn't take it away from him, likely in my opinion.) Soon to be president Pence would invoke the incapacity clause and a slam dunk would ensue.
Could the president be indicted in a court of law for treason? Yes if the evidence was very clear, very convincing and without exculpatory evidence, since such a trial would incapacitate the president soon to be president pence would again swiftly invoke the incapacity clause.
However, it has to be more than supposition, circumstantial evidence and hearsay.
An example was the dead brutch hillary email server. President Obama swore that the first he had heard of it was on the news but he was emailing her on the dam thing. Now we all know that according to the fbi she was very careless having classified information on it but didnt really mean it and well she is a democrat after all. Ok, so other people lose their jobs, go to jail for much lesser offenses but ok, thats the way it works in that world.
Now for the drumpster. Lots of noise, the feebs trying to pull an abscam on the peripheral players very early in the election cycle, lots of wheezing and gasping from the media, lots of haruphing and finger pointing by fox news but I dont see an indictment there yet.
Certainly not enough to put a future president in jeopardy because 49% of the people dont like them.
My 2 cents