Congressional oversight... Congress’s oversight authority derives from its “implied” powers in the Constitution, public laws, and House and Senate rules. It is an integral part of the American system of checks and balances. However, there is no direct Constitutional authority for such power... leaving it open for challenges and limits to its use. For example... it should never be used to conduct or find CRIMINAL BEHAVIOR that is a function of the DOJ. It should never be used for political purposes such as smearing opposition candidates.
Congressional oversight is not an enumerated power... it is implied, therefore it is subject to interpretation and may be challenged, on its face, as being Un-Constitutional. Enumerated powers are specific powers and authority granted to the U.S. Congress by the U.S. Constitution. They are primarily found in Article 1 Section 8 of the Constitution. Congress may lawfully exercise only those powers that the Constitution grants. There are 22 enumerated powers and OVERSIGHT IS NOT ONE OF THEM. See: https://freedomoutpost.com/congress-enumerated-powers/
It is time to challenge the long-held concept of Congressional Oversight... as being an overreach in most cases, to their Constitutional power. Congressional oversight should only extend to their enumerated powers and be limited to those items necessary to inform their legislative duties. Congress should not engage in prosecutorial or criminal investigations, as a function of oversight. Hence, their subpoena powers should be limited and are not what Congress would portend they are... Period.
Finally, IMPLIED POWERS should not exist... beyond those directly and inexorably tied to an enumerated power... using implied Constitutional power to extend Congress's authority, opens the door for massive usurpations of powers not permitted or contemplated by our founders. If a so-called 'implied power' is necessary to the functioning of Congress... let Congress and the States AMEND the Constitution to grant such power and authority. Otherwise, any number of implied powers may be used by a rogue Court and Congress to subvert our Constitutional Republic... which Congress and the Courts are actively engaged.
For More On Congressional Oversight see - Wikipedia
So, no one cares that Congress is usurping the Executive Branch's exclusive powers to investigate, prosecute, and enforce the laws of the land...
No one cares that Congress is violating the Constitution... asserting it has carte blanche authority to investigate anything and everything... too, assign criminal culpability, and to use its powers to politicize Congressional hearings. Too, misuse its hearings, to become ad-hock US Attorney's, Grand Juries, and police authorities... focusing its usurped power on the destruction of the opposition party.