They could agree to grant a writ of Certiorari.
But, they want to enforce the Second Amendment, not gut it.
Four justices want to gut the amendment, probably most notably, Ruth Bader Ginsberg.
They cannot stop a writ of certiorari, but if they can get a fifth justice to join them, they can gut the Second Amendment.
So, the four will not grant a writ of certiorari unless they are reasonably sure they can enforce the Second, not gut it.
They clearly have serious doubts about a fifth justice. Who would it be, if not John Roberts?
Thanks. I see the logic of that.
The way it was written made it sound like they needed A and they had A but nothing would happen because they didn’t have A. I was scratching my head.