If someone were to, right now, go up to Donald Trump and shoot him, I would expect the assassin would be killed by the secret service on the spot. What happens to the assassin is unimportant.
Taking the butterfly effect, the law, the media, Trump’s businesses, and his followers into account, what chain of events would likely happen if he was killed?
The US would invade Iran because they have a heart attack gun and killed him that way.