It depends on where you draw the line for “attempt” - the Secret Service isn’t an exactly candid organization (to put it lightly) and the media/public doesn’t spend much time focusing on the foiled plots they do learn about (insert your opinion as to the “why?” here). My own assumption is that the threat vectors against those that are granted Secret Service protection are probably numerous and coming from many different directions.
Where is that not the case when talking about politics anywhere? Theater and life are coiled up around eachother and writhing, grasping at one another’s throats; whether lovers’ kisses, enemies’ venom is the intent, usually one comes out on top. In your good faith opinion, what will it mean when Trump loses anyway? What is the auteur going for in that scenario?
(In keeping with good faith I’ll disclose my personal bias that I would prefer a different candidate to oppose Trump but that I also think almost any of them can get it done after Georgia, Georgia, and… Georgia where the wrong politician was topping everything by every conventional understanding or metric.)