There have been others. I join in the disappointment at the sad turn the ACLU has taken. But they have been consistent in their opposition to no-fly lists, as an end-run around due process, and have applied the same argument against proposals to create similar no-gun lists. They are right in both cases.

Then there was this case, which was mainly 1st amendment, but with strong 2nd amendment ingredients:

https://lee-phillips.org/aclu2/

Yes but for all practical purposes it's not the same organization anymore.