My conspiracy theory: this fall there will be a huge fight over government funding. Primarily it will be over the border wall. Trump will not be able to back down as he claimed the last time was that he wouldn’t do it again. But there aren’t enough votes to stop the democrats from blocking the wall funding. Government will shut down. Trump will blame the democrats and claim that they are blocking the will of the people. His supporters will demand that he lock them up. Trump declares a national emergency and assumes "temporary" powers to enact the budget. After all its the democrats' fault. They’ll deny he has assumed dictatorial powers. The Democrats (the real feckless cunts, WADR) won’t do anything but scream and shout. They may try to file a lawsuit over the use of funds. That will be tied up in courts for years.
https://www.cnn.com/2018/06/01/politics/steve-bannon/index.html
SLD
I wouldn't be surprised, but somewhere in there has to be a plan to suspend the elections, or at least
some elections to the degree that Republicans continue hold the House and Senate. A majority of Conservative/Trump voters have already said they'd be willing to suspend elections if they thought illegal voting was taking place, which is something they've been primed to believe for years now.
Generally, the federal government can't interfere in state elections, but considering that the majority of states are red, it's easy to see enough governors and state legislatures going along with the idea. Also, I think that Congress and the POTUS can declare states of emergency, which would then grant them the power to do any number of things. Closing polls on voting day, whether ordered by the state or fed would be a pretty easy thing to do following that. Disburse local police and some soldiers to voting booths to turn people away, and don't count mail-in ballots. Voila, no more democracy.
It would literally take just a matter of days and a relatively small handful of people to destroy the nation as we've known it. Then the arrests would start.