Couple He must be thinking about X

The end of the rabbit hole

Tom Steyer has ambitions to be the next Governor of California, in the style of Gavin Newsom.
By "The end of the rabbit hole", is it meant the bottom floor of the rabbit WARREN ?

No, the end of the link chain

https://www.scmp.com/magazines/style/celebrity/article/3175760/who-was-19th-century-merchant-howqua-chinese-bill-gates

Ironic Coincidence that John Kerry is a Forbes descendant, is it not ? That's a nice fortune cookie.

I haven't seen a right-winger cite a source without prompting in a good while. I commend you

Who is left and right ?
To cite is only in support of one correct premise.

There are others. & what have you to cite in support an end chainlink?
Can others not link right to that and connect ?

-John Kerry states "I work in several capacities.... I work with Galvanize Climate Solutions. Full Time Climate addressing the Energy Transition, and working constructively with people. ...It's not funded. It's a ...uh, you should..."
-Ezra asks: "Do you work for free?"
-Kerry replies: "Ha. Tom Steyer is the uh President, is the uh Co-Chair."
-Ezra: "Oh so he made his money in coal. Don't you find that UNUSUAL that Tom Steyer made his money in Coal, and he's PAYING YOU?"
-Kerry: "Who said he's paying me?"
-Ezra: "Are you a Volunteer Sir?"

Source: (Yes, and inspiration for the figuratively pejorative parody meme)
https://www.youtube.com/watch?v=Go1_ur2dedY