We've missed the exit for the third-best timeline that still involves That Guy: the one where Donnie bites the dust before the elections. Unless someone fills the guy's plane with Anthrax or something like that, we're still on track for locking in the USA as a failed state.
(the second best timeline with That Guy would be the one where he simply loses the election. The very best would be where the DOJ makes something stick against him & he's disqualified before the elections.)
Let's also face it, if there's a candidate that's so divisive that someone looks at the massive security apparatus for people like him and still think it's worth trying to assassinate him, that would be grounds - at least for me - to re-evaluate whether the candidate is the right guy.