Trump and Hitler Both

 -- were malignant narcissists, devoid of empathy
 -- suffered from paranoia and delusions of grandeur.
 -- had strict authoritarian fathers.
 -- were deeply affected by the death of a brother.
 -- performed poorly in school.
 -- struggled with temper tantrums they never grew out of.
 -- evaded the draft by claiming medical deferments.
 -- failed at everything they attempted in their early adult lives.
 -- wrote autobiographical manifestos explaining their world view.
 -- admired demagogues and ruthless dictators.
 -- believed their country’s democratic government was run by a criminally corrupt deep state only they could fix.
 -- rose to power by appealing to rural Protestants and did not appeal to the “liberal elites” in large cities.
 -- campaigned on a promise of returning their country to glory by making it great again.
 -- were nationalist, isolationist, and anti-globalist
 -- rejected ties to other countries through migration, economic trade, and security alliances.
 -- claimed unfair treaties were crippling their countries.
 -- made border closings a centerpiece of their political campaigns.
 -- were white supremacists who blamed problems within their country on minorities and immigrants. -- loved to give hate speeches to large crowds of supporters.
 -- never accepted blame
 -- constantly instigated political controversy
 -- encouraged supporters to wear branded clothing showing support.
 -- vilified political opponents, calling them leftist, liberal scum, socialists, communists, and spoke of the desire to imprison them.
 -- derided the electoral process and referred to it as being rigged against them.
 -- pretended to respect Christianity but were actually atheists who despised and feared religious people.
 -- had to overcome old guard conservatives who did not approve of their demagoguery, as well as military and cabinet-level advisors who believed they were reckless and worked against them (all of whom eventually became sycophants or were driven out for disloyalty).
 -- used blackmail over their own party to coerce support.
 -- made frequent comments suggesting they would never relinquish power.
 -- attacked the rule of law, eventually stacking the courts and law enforcement with loyalists.
 -- manipulated their followers with lies and propaganda.
 -- refused to acknowledge any mistakes and responded to critics with personal attacks and name-calling.
 -- rejected scientific data that undermined their false claims.
 -- attacked the media and claimed any bad news about them was fake.
 -- demanded military parades in their honor.
 -- demanded that those within their government pledge loyalty to them over loyalty to their country. 
 -- gave up alcohol, but were secretly addicted to stimulants.
 -- allegedly suffered from increasing bowel problems and walked with a shuffling gate, showing signs of diseased minds.
 -- locked immigrants in cages denying them the right to due process.
 -- caused the death of massive numbers of their own citizens without accepting any blame and without expressing any empathy or remorse for the loss of life they caused.

 (modified slightly from a post by "Uncle Blazer" on twitter)