The author compares Mr. Trump's actions to those of dictators around the world. In what ways have Trump's actions been similar to those corrupt leaders? In what ways are they different?

Even before U.S. President Donald Trump took the oath of office in 2017, serious observers were worried about the fragility of the United States’ democratic order and Trump’s all-too-obvious dictatorial proclivities.
It was partly his evident narcissism and contempt for the truth, but also his willingness to run roughshod over long-standing norms, his long record of fraud and shady business dealings, and his evident admiration for dictators in other countries.
Below are some points Trump's actions been similar to those corrupt leaders?

Systematic efforts to intimidate the media.

Building an official pro-Trump media network.

Politicizing the civil service, military, National Guard, or the domestic security agencies.

Using government surveillance against domestic political opponents.

Using state power to reward corporate backers and punish opponents.

Stacking the Supreme Court.

Enforcing the law for only one side.

Really rigging the system. 

Fearmongering

Demonizing the opposition.