[kmos17]

Besides the excellent points outlining the awfulness of Trump’s first term in other responses to your question, the most important factor making him unfit for office is his complete refusal to accept any election he loses and the peaceful transfer of power. He is directly attacking the democratic process itself, as many authoritarian dictators have in the past.

Many of his supporters are fully cognizant of this, as much as they will publicly claim this is just pearl clutching by the left, they actually believe this is the best course of action, because the political discourse has been so deeply poisoned they do not think democracy is the best way forward. This has happened many times before in various countries with always horrific consequences.