There have always been such decisions. I remember one where Scalia and Thomas were on the same side as Breyer and Ginsburg.
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Let me know when Kavanaugh doesn’t Vote with Roberts.
The two are seen together often.
There was one entire Supreme Court session — it might have been 2016-2017 — when the two justices who voted on the same side more frequently than any other pair were Thomas and Ginsberg. Go figure.