Not an insider, but I have a background in intelligence collection and analysis. Everything trump is doing indicates that he is willing to take this as far as the American people will let him, up to and including martial law, military tribunals, and executions for treason. What we are seeing is a public negotiation, where trump is making daily offers to his opponents that they reject completely, and every day trump ratchets it up a little further.

Flynn will be on Lou Dobbs tomorrow night, and Lou is a maniac, so he will ask Flynn about this tweet, and whether he thinks that martial law to facilitate an election redo is a realistic possibility. My prediction is that Flynn will then proceed to remind everyone that this kind of thing is neither unprecedented, nor all that extreme as our history goes. He will talk about a limited form of martial law that will focus entirely on conducting a new election, either in the battleground states only or across the country. He will point out that it is the last resort. And he will say something like, I hope it doesnt come to that, but I also hope the president will do what is right if necessary. Flynn will be seen as a trump proxy, and on the right this will serve to begin normalizing the idea that this could really happen. Plenty of people are already in favor of it, but flynn will give them the rhetoric necessary to defend it.