I think despite the multitude of reasons he's so radioactive to anyone in politics, like the whole "supporting terrorism", and "hating America", and "no loyalty to America", and "animal abuse", the reason he struggles to make real headway in political influence is that people involved with politics with an ounce of social skills or intuition can tell he's very obviously in this for himself, and just wants to co-opt their causes to inject his stupid horseshit (look at what he did trying to purity test that one governor candidate with Israel-Palestine). He can't help himself, because he's not just a narcissist, he's also a fucking tard.
Politics was always just a means for him to get the adulation and adoration he feels he deserves for having the "right opinions". He doesn't give a shit who he "helps" or hurts as long as his social standing and clout increases. As a matter of fact, he not only hates the people he wants to hurt, he fucking hates the people he claims he wants to help.

Literally this meme.