This tactic may work in the 90s and 00s era where crowdsourced campaign funding and modern online organizing didn’t yet exist.

Nowadays people can pressure their friends and family to vote and dilute lobbying pressure.

How impactful was the Norquist crowd in 2018?

A lot of the GOP seats that were held in this past cycle were in very, very strongly held districts. Those are the politicians that are most worried about upsetting the Norquist based SIG. Furthermore, as long as the Senate is still majority GOP it really doesn’t terribly matter to the GOP even if it was 80%+ Democrat in the house. They should be generally comfortable that the judicial branch is now solidly in their favor for decades even if they lose an entire branch now.

You can talk about policies all you want but the GOP are substantially better politicians than the DNC could ever hope to be.

You might be right. Looking at opensecrets.org, it looks like their activity has really dropped off in the last decade. It would nice to finally be free of them.

As long as our votes are secret, you can't "pressure" anyone to vote any way about anything.