You don’t IMPEACH a dictator.
The law does not apply to them, because they are the law.
Have you not been watching and observing of late?
You Ceaușescuize dictators.
This is in contrast to impeachment, the judgement for which "shall not extend further than to removal from Office, and disqualification to hold and enjoy any Office of honor, Trust or Profit under the United States: but the Party convicted shall nevertheless be liable and subject to Indictment, Trial, Judgment and Punishment, according to Law." (Article 1, Section 2, Clause 7).
I suspect the Founders were thinking of Charlie I when they wrote that.
Removal is the only way.
Glue some balls on Congress and do it.