That doesn't fit the captiol protest very well. Sudden? Decisive? Exercise of force?
Start before the election with attempts to suppress Democratic voting (I did not know this, but apparently mail-in ballots are known for leaning Democratic---"Red mirage and blue surge" or something.), then attack the legitimacy of the election, both in the legal system and in public statements (increasing the latter as the former failed), further make semi-covert calls for illegal actions on the part of various officials associated with the election, and finally call for and support a protest (specifically including the more extreme supporters) at an event that is largely a formality. Yes, I think the whole course of events satisfies the definition of a coup.
Not a competent one, of course. A competent coup would have called in National Guard or military forces to suppress the rioters and at the same time sequester the members of the House and Senate in an undisclosed location for their own protection. Then declare a national emergency, place National Guard or military forces in state capitols and large cities---at that point violence becomes inevitable and the coup self-sustaining. (This isn't exactly a genius mastermind plan; it's how it's done all over the world.)
That does require the cooperation of the military, which Mr. Trump never really had, though.
Some of us are still wondering, though, why there were only Capitol Police at the Capitol. It seems likely that had the protest been another group, significant riot control forces would have been in place.
