Trump is a rogue agent in a lot of ways, even with his own party. I can totally see him befalling an "accident".
That is exactly why he is at risk. The Deep State doesn't want him, they don't know if they can control him and fear they can't. He's in a particularly good position to disrupt a lot of establishment power.
From history I learned that the last president capable of cutting the defense budget was Eisenhower because anyone accusing him of being soft on defense would look an utter fool. Trump isn't in that category, he knows that his detractors will never give him any credit for anything he does, so he has no reason to try to please them. I'm not referring to the average voter, I'm referring to the movers and shakers within the government.
He has the potential to be very inconvenient to those who seek power for themselves. And they don't like being inconvenienced.