Just an opinion, but I don't think Trump is getting or will get much of a sympathy vote bumps, as say Ronald Reagan did. Everything with Trump is already baked in. 40 some % support him and like him, 40 some percent (slightly more I believe) can't stand him and won't vote for him. And sympathy isn't going to change those numbers.
What has changed those numbers just a few points, and that is all it takes, is just a few independents feeling like one guy just is not mentally capable of doing the job. Once you remove that nuance, I think you go right back to a razor thin race.