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… - Ketanji Brown Jackson

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.

And, of course, if present frequent occupants of the West Wing or Situation Room must find time to appear for testimony as a matter of law when Congress issues a subpoena, then any such immunity most certainly stops short of covering individuals who only purport to be cloaked with this authority because, at some point in the past, they once were in the President’s employ.

The United States of America has a government of laws and not of men. The Constitution and federal law set the boundaries of what is acceptable conduct, and for this reason... when there is a dispute between the Legislature and the Executive branch over what the law requires about the circumstances under which government officials must act, the Judiciary has the authority, and the responsibility, to decide the issue.