He laid out how it was related:
"I write separately to highlight another way in which this prosecution may violate our constitutional structure. In this case, the Attorney General purported to appoint a private citizen as Special Counsel to prosecute a former President on behalf of the United States." -Thomas
The question of immunity was about the administration inappropriately prosecuting people and he highlighted another way the prosecution might have been inappropriate.
@futurebird perhaps.
Though it looks like Weiss was Senate-confirmed so the issue may not apply to him.
@volkris
This is fantastic news for Hunter Biden.