Do you have any more information on how that all occurred? There must be a lot of internet ink spilled on that subject. I suppose I should look into it. All I remember about the rise and decline of the Tea Party was that we got a bunch of Republicans elected to the House in 2010, and then the Occupiers began to get a lot of press, and the Tea Party was no longer such a big story. Or maybe people were just done protesting, thinking they had accomplished the goal by "winning" the House.
Another glaring lacuna in my fund of knowledge, that I ought to fill.
It's power was also it's weakness.
The Tea Party was so genuinely grassroots, it had no leadership or any mechanism to say who or what was "Tea Party" and who and what was not. There was no central comitte or leader to declare something genuine Tea Party or a pretender.
All sorts of GOPe, big-gov "We just spend 5% less than Democrats"-type socons were able to try and co-opt it with any sort of "outsider" status in any election, or position of punditry where their ability to pose as such wasn't completely laughable. And worse, the Left was able to also do the same, and define whatever boogeyman they wanted to as being "Tea Party" as well.
And it's to the point that the entire concept of what was "Tea Party" got so muddied and diluted at the same time, it kind of fell apart.
I even know a lot of more liberty-cons, moderate-cons and others who turn up their nose at "Tea Party" now because both the confusion, and the demonization have penetrated to the point they believe it's Lyndon LaRouche, Family Research Council, and John Bircher stuff now.
Hell, Rubio WAS one of the biggest Tea Party movement candidates, where he challenged Christ, and ousted him. Now a bunch of the electorate views him like he's almost as GOPe as Jeb!
Further, I think you're right. The grassroots Tea Party kind of faded out at the same time after '12, once Obama won his second term and the GOP primary process failed to bend to Tea Party desires and chose Romney. And yeah, as the GOP got control of Congress, there just wasn't that much to fight over anymore until now. And some of that angst, what was left has been sucked up by Trump.
That's at least my gut-level impressions of how it devolved.