He doesn't pay his taxes.
He pardons criminal pals.
He teargasses peaceful protestors.
He calls white supremacists very fine people.
He lies about pandemics.
He emulates dictators.
He applauds violence towards journalists.
He puts kids in cages.

What more do you need to know?

He calls the military 'suckers' and 'losers'.
He trashes John McCain's service.
He calls African nations "sh*thole countries".
He is credibly accused of dozens of sexual assaults.
He calls climate change a hoax.
He doesn't believe in science.

What more do you need to know?

He insults Gold Star families.
He golfs and watches TV more than he works.
He solicits bribes from Ukraine for political purposes.
He threatens to stay in office even if he loses.
He is a 'birther'.
He cons people with things like Trump University.

What more do you need to know?

He tries to take away people's healthcare.
He cuts taxes for himself and his friends.
He suggests injecting bleach.
He obstructs justice.
He speaks incoherently.
He tries to ban religions.
He ignores Puerto Rico after it's hit by a hurricane.

What more do you need to know?