Stated simply, the primary takeaway from the past 250 years of recorded American history is that Presidents are not kings. ...This means that they do… - Ketanji Brown Jackson

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.

Stated simply: The Court has now declared for the first time in history that the most powerful official in the United States can (under circumstances yet to be fully determined) become a law unto himself. As we enter this uncharted territory, the People, in their wisdom, will need to remain ever attentive, consistently fulfilling their established role in our constitutional democracy, and thus collectively serving as the ultimate safeguard against any chaos spawned by this Court’s decision. For, like our democracy, our Constitution is “the creature of their will, and lives only by their will.”

[W]hen a committee of Congress seeks testimony and records by issuing a valid subpoena in the context of a duly authorized investigation, it has the Constitution’s blessing, and ultimately, it is acting not in its own interest, but for the benefit of the People of the United States. If there is fraud or abuse or waste or corruption in the federal government, it is the constitutional duty of Congress to find the facts and, as necessary, take corrective action.