The mistake that the Supreme Court makes is to presume that the answer to this specific question must be found in the Constitution.
Could executive branch agencies be turned into helpful adjuncts to federal courts without usurping judicial power? Yes they could.
Ilan Wurman is an associate professor of law at the Sandra Day O’Connor College of Law at Arizona State University. He is the author of A Debt Against the Living: An Introduction to Originalism (Cambridge University Press, 2017).