Trump said he will be a dictator in a media interview. See the first link posted by Lighter, for example the third article on that page:

Daily Telegraph, Thu, December 7, 2023 at 4:29 AM GMT+11

"Donald Trump has said he will become a dictator for the first day of his second term if he wins next year’s presidential election.

"The Republican frontrunner refused to deny that he would abuse his power to seek revenge on political opponents if re-elected to the White House.

“'You are promising America, tonight, you would never abuse power as retribution against anybody?' Sean Hannity, a Fox News host who has long been a supporter of Trump, asked during a televised town hall in Iowa on Tuesday.

“'Except for day one,' Mr Trump responded."

Or this paragraph in Oz ABC News:

"Mr Trump on Tuesday was asked by Fox News Channel's Sean Hannity to promise he 'would never abuse power as retribution against anybody'.

"'Except for day one,' Mr Trump responded.

"'I want to close the border and I want to drill, drill, drill.

"'After that, I'm not a dictator.'"

And in my opinion, i he thinks it's acceptable to be a dictator on day one, then he will not stop at day one.