He has engaged in acts that mirror the behaviors of tyrants in history, including his:
(i) mischaracterizations, lies and outright attacks on the truth (such as claiming that millions of people committed voter fraud),
(ii) failure to disclose his tax form and address potential conflicts of interest,
(iii) suggestion that certain ethnic or religious groups are inherently dangerous, and promotion of immigration policies that appear more focused on fear of outsiders than legitimate security concerns,
(iv) lack of regard for discrimination and hate crimes that can be promoted by his rhetoric,
(v) support of Putin - a corrupt murder and hater of freedom - such as by inviting Russia to hack the US elections, and suggesting that Putin's Russia is American's moral equivalent, and
(vi) lack of respect for US democratic institutions, and attacks on the independent judiciary ("so called judges") and content based attacks on independent media outlets when they don't agree with him (including false and cynical claims of "fake news").