could be more than just Trump issues.
Trump has faced two assassination attempts, and had people around him die. that is going to make anyone consider it.
the overall rhetoric and attitude to anyone associated with Trump has continued to get worse, and I doubt it cools down if he wins. that could also change minds.
maybe they found a better job, or one they like better.
maybe they are in a different spot in their life now, family, kids, spouse.
maybe they just don't want to wade into the same crap storm they were ignorant of before. that could be partial Trump crap storm, partial DC crap storm, and partial society crap storm.