This is a classic case of “if you don’t want to know the answer, don’t ask the question.”
[What Could Happen If Donald Trump Rejects Electoral Defeat?][reject] Masha Gessen at the New Yorker explores some scenarios and comes up with chilling, run-for-the-hills, answers.
Remember that Trump is already on record (e.g., interview with Chris Wallace) expressing doubt that he will accept a loss at the ballot box.
You need to read this one on your own. My borderline panic needs company.