Well when Trump could have invoked the insurrection act, he choose not to.
I do disagree with the claim that just because Trump did 4 years we should know exactly what to expect. People do learn lessons and there is hardly a motivation to avoid using the military when they accuse you of doing it regardless.
I think his base, the real core of it including me, would not have objected if he used the military to secure the election process. There is a fundamental contradiction in the constitution between the body and the amendments. The amendments create a right to vote federally, but the body says that state legislatures have authority over how electors are selected.
The amendments imply that federal authority AND duty to secure every federal election. The electors clause implies that state legislatures can do whatever they want. There is no reconciliation, and you can be damn sure that if a swing state just happened to be in the possession of a radical but slight right-tribe majority and sent in electors without even holding a popular election the left-tribe federal infrastructure would certainly use the military to run an election or "force" the running of an election (as if there is a difference).
Now for some reason some people think there is a meaningful difference between a state simply failing to hold a legitimate election either through legislative process, judicial whim, or bureaucratic whim (state secretaries) and a state failing to hold any purported election what so ever.
Of course there isn't, and if there was a difference in practice any state wishing to act in an undemocratic manner would simply pretend to have an election. That is precisely what "election deniers" think occurred in several swing states so it's only natural for them (us) to believe federal military intervention was justified AND that the constitution needs to be repaired to remove the contradiction to make clear that federal elections have a nation-wide definition which supersedes state legislatures much less petty judges and unelected tyrants.
There is what ought to be and what is, I think anyone who really believes in democracy in any sense (and I barely do) would consider the implementation of biometric blockchain elections to be an overriding issue. I dismiss and scoff at anyone who appeals to 'democracy' without agreeing. They have failed king Solomon's test.
Rather more relevant to the reader than my logical if personal beliefs is the fact that election denial is not dead, far from it, and that Trump was given zero credit for any lack of heavy handedness. Indeed they've tried to railroad him, bankrupt him, and kill him as if he was someone who declared martial law at the first molotov cocktail.
It is not implausible that he has changed his outlook and will bring a new hard edge to his second term.