Thus, DOJ’s hand-waving over the Judiciary Committee’s purported failure to establish a “cognizable” injury for standing purposes... masks the substa… - Ketanji Brown Jackson

This result is unavoidable as a matter of basic constitutional law, as the Miers court recognized more than a decade ago. Today, this Court adds that this conclusion is inescapable precisely because compulsory appearance by dint of a subpoena is a legal construct, not a political one, and per the Constitution, no one is above the law.

What is missing from the Constitution’s framework as the Framers envisioned it is the President’s purported power to kneecap House investigations of Executive branch operations by demanding that his senior-level aides breach their legal duty to respond to compelled congressional process.

Thus., when presented with a case or controversy, it is the Judiciary’s duty under the Constitution to interpret the law and to declare government overreaches unlawful. Similarly, the House of Representatives has the constitutionally vested responsibility to conduct investigations of suspected abuses of power within the government, and to act to curb those improprieties, if required. Accordingly, DOJ’s conceptual claim to unreviewable absolute testimonial immunity on separation-of-powers grounds—essentially, that the Constitution’s scheme countenances unassailable Executive branch authority—is baseless, and as such, cannot be sustained.