They claimed he said he would be a dictator on day one, only. But, that was because, that was what he said. I don't think they believed he only intended for day one, as he's been known to lie like a rug.
Don't bet on it. He is the richest man on earth and basically bought the presidency for Donny. Without Elon's $277 Million, Donny only raised $87 Million of the campaign funds used. Nobody thinks trump could have won with an $87 Million campaign. Heck, at $364 Million, he only won the popular vote by less than 1.5%. He and the Republicans own Elon. Big Time.