That is my understanding as well. The follow up question is this. How do you do this to any real positive effect? Some groups are effective. Some are not.
I suppose it depends on what you are trying to do, the rules of the party or organization you are trying to influence or control, your effectiveness at persuading others to join your effort, your competence at managing the resources dedicated to the effort, and so forth. All those things can vary wildly from one particular instance to the next.
The recent "takeover" of the Libertarian Party by the Mises Caucus, which happened just last week, provides one example of a resoundingly successful caucus strategy. Whether or how the same kind of thing could work in some other context would depend on details such as the size of the party or organization you are attempting to influence or control, and the scale at which you are trying to influence or control it. Are you trying just to control or influence a local branch of a national organization, for example, or the whole thing on a nationwide basis? The Mises Caucus worked at both the state and national levels. It now controls all of the national LP and thirty or so state-level LPs (with more likely to be added). The Republican party, by comparison, is much larger and more "general" (so to speak) than the LP, and the opposition to any "insurgent" caucus is likely to have much greater resources at its disposal, making the job of the "insurgents" that much harder.
[1] - so any such effort would have to take those factors into account when devising and implementing its strategy.
[1] There very much needs to be a GOP Mises Caucus, by the way. But their goals - or at least their strategies for achieving their goals - would have to be different from those of the LP Mises Caucus, for the reasons I have mentioned. Tho Bishop of the Mises Institute is trying to do something of the sort for paleolibertarians, but I don't know the scale of his project's ambitions (he's operating out of Florida - the Tampa Bay area, I think) or the prospects for success in achieving whatever their particular goals happen to be.
