Who will arrest them?
I think you are over-worrying - this is a battle between good and evil and Trump and his people have been planning this in great detail. They will have the upper hand, I have no doubt. It is nerve wracking to be sure, I have to go for walks, play my guitar, read inspiring books, pray and do other things so I don’t think about this all the time.
My first guess is 'rogue' FBI agents, making it appear that it is simply an DoJ/FBI matter - nothing to do with a coup d'etat. Next: Fed Marshals, Capitol Hill Police, military. {You need to study how coups are carried out.}
***I think you are over-worrying - this is a battle between good and evil and Trump and his people have been planning this in great detail.***
So nothing is required of us; unlike what Q says, we can just pour down another Duff beer and watch others save our Republic. Secretly DJT is wrecking all opposition and the evidence of our lying eyes means nothing.