If so, do you think he will proclaim himself as King of the United States, and turn the government into a theocracy? What if his heirs are sworn in as princes?
It's not how tyrannies work
They work by pretending they're still democracies. Look at Putin, look at President Mugabe in Zimbabwe. He would continuing to call himself "democratically elected President" and assign that role all the powers he wants.
This - thinking a tyrant will call himself king - is exactly how coups and despots get away with it. The average American would not tolerate a king, that would be too much. They know they don't believe in monarchy. Their sense of pride would require them to rise up (which they don't actually want to do because it's scary and a lot of work). But if they can say "he's president, just like the long line of presidents before him" then they can retain their pride - save face - without having to rise up, whatever powers he gives himself.
For example - voter suppression. They don't actually say "we're banning poor people from voting because they won't vote for us". Instead, they make it so there's only one polling place in poor districts and it's a 2-hour drive away and the line is 6 hours long and then they say food vendors aren't allowed to set up near polling places. In practice, way more poor people don't vote in that area, because they can't spare the time, they can't get childcare to cover it, and their kid can't wait in line for 6 hours without food. But they're still technically legally allowed to vote. That's what the end of democracy looks like. (And if Trump is "democratically elected" in a country that makes it extremely difficult for key sections of the population to vote, then will you say "ah well, the people voted for it, how can I argue with that?")
Tyranny will creep up on you if you expect it to look on the surface like monarchy, theocracy etc. Look for the actual powers people have, and the actual effects of legislation, not just the name of the legislation on the surface.
Re: theocracy specifically, Trump isn't religious but he's easily manipulatable by anyone who flatters him, which the religious extremists know how to do. Eg Trump isn't personally against abortion (he's paid for plenty of them) but he's manipulated by religious people who are. He enabled the end of Roe v Wade - a goal of religious people that is undemocratic (the majority of US citizens want abortion to be legal, so banning it can only be achieved by undemocratic measures) but he didn't have to declare religious rule to do it - he just let religious people get control of the courts.
You can be living under a religious rule - theocracy - even while everything on the surface still pretends to be a constitutional democracy. Don't get fooled by the surface. Don't be "relieved" went Trump doesn't declare himself king or institute a theocracy. It doesn't mean you won't be living in one.
