1) Let's be clear what you mean by that. IF you say that because you are skeptical that Trump will EVER be held accountable for his crimes, you are wrong. IF you say that because since Trump is the ONLY one who has mentioned tomorrow as the date for his arrest and he is a SERIAL LIAR (and besides that just so stupid he often just gets things wrong), then you are probably right.
2) What will be really telling though is if there is ANY gathering of any significance of Trump supporters to protest his arrest. For one thing, anyone rallying to his defense at this point is just the bottom of the barrel intellectually. For another thing...nah, that first thing stands well by itself.
3) IF they were actually going to arrest Trump on Tuesday, now that he has posted what he did, what they should do is just wait a day or two. I've waited this long. I can wait another couple of days.
4) From what the experts are saying though, his arrest is coming soon, but probably not tomorrow...another week to 4 weeks is more likely.