Real dictators don't have <50% approval ratings...
For the purposes of this poll we'll assume he doesn't (or didn't yet) crack down on the polling companies.
Cracking down on the polling companies isn't the issue.
You get a call in the middle of the evening from a stranger saying "Do you approve of President-for-Life Trump, long may he reign, and his restoration of the Republic by seizing power away from the treacherous Democrats, corrupt bureaucrats, and elderly judges?"
Your response totally is "Yes, of course. Hail Trump!"