The Chamber of Commerce can do no wrong before the United States Supreme Court this term, as reported by the Constitutional Accountability Center:
With today’s decision in Southern Union Company v. United States, the Chamber has declared victory in all seven of its cases that have reached a clear outcome (two are additionally classified as “other” because the Court avoided addressing the issue at stake on procedural grounds, and in one the Chamber filed on behalf of neither party).
This case is a bad example to make the argument that the Chamber is getting special treatment. Sonia Sotomayer wrote the majority opinion in this case and Alito and Kennedy dissented.
It seems to me that the Chamber wins more in the Roberts court because the administration is incompetent.