One thing particular to Trump is the percentage of his supporters in polling that support him no matter what. Trump has maintained some of the most sustained, consistent support of any modern political candidate. His base polling numbers basically haven’t moved in like 10 years.
Trying to have his VP executed, injecting bleach, porn stars, felonies, treason, domestic use of military, anti-veteran sentiment, belittling the disabled, racist comments, sexist comments, sexual assault, etc., etc., etc. None of that meaningfully moved the needle.
You are not going to “get” Trump on anything like that. If you want him to lose support, he needs to be seen as weak, ineffective, and laughable in the eyes of his supporters. None of the above does that, because that isn’t what Trump supporters care about. They care about hurting people they don’t like or see as lesser-than. If Trump stops doing that effectively, he will lose support. But, frankly, he’s really good at it.