Trump is nothing but a puppet - a media celebrity selected by Russia and the american right to be a standard bearer - he's not making any decisions. He's there as a distraction.
It's Heritage Foundation that are in charge and they are implementing Project 2025 - Russ Vaught is the Director of the OMB (which essentially runs the federal government) and he was one of the Project 2025 authors.
The Heritage Foundation love Musk and JD Vance has close links with them. The first term was about laying the groundwork - getting the judges in place, further gerrymandering the voting districts and ridding the republican party of sensible politicians and replacing them with the likes of Margorie Taylor Greene to make the take over easier in the second term (fully helped by Russia in getting all of the disinformation out there).
Trump was just the figure head who could whip people up and attract the voters - he is a means to and end for them to get into the White House. When something happens to him (whether health related or assassination), Vance will take over and he will be a thousand times worse.
I strongly suspect there will not be any further fair elections (there will be elections but they will be very much rigged) until it all comes falling down during a civil war.
I wouldn't be surprised if some states like California and New York start to look at seceding the union - whether they will actually be allowed to though is open to debate.