They’re referring to the literal campaign strategy / platform he ran on which includes such fascist rhetoric as deporting 20m immigrants (when there’s at most 13-15m by most estimates, every single one of which helps the economy and is not a burden in any way) and “it’s the last election you’ll need to vote in”, as just a sample. Oh and don’t forget “I’ll only be dictator for one day” as a bonus, a treat. That’s what people mean when they say democracy is dead.
It doesn’t matter how bullshit or not it was, it matters that people voted for it.