I think those who divide the SCOTUS between conservatives and liberals are making a fundamental error in interpretation. The better understanding, I think, is that the Court is 5½–3½ Technocrat.
The “liberals” will always vote in lockstep to support the liberal political agenda, which includes promoting the technocratic enterprise.
The three “conservatives,” Scalia, Alito, and Thomas, can be more counted on to apply the law as written and Constitution as intended.
Roberts is very pro-technocrat — hence his two Obamacare rulings — and Kennedy is a wobbler technocrat.
Hence, most rulings will promote the technocratic agenda regardless of the subject. And that will soon include issues of international governance.
What does that mean for SSM? The technocratic class wants SSM. We will have SSM.