The United States Capitol Police (USCP) appears to be a law enforcement agency and has been in the news since the capitol riot of January 6th, 2021. However, in recent events, the Capitol Police leadership has asserted that it is not a federal law enforcement agency to refused to honor freedom of information requests (FOIA) directed to it. For example, Ronald Gregory of the USCP's Inspector Generals Office has responded to press attempts to gather information saying:

“The Office of the Inspector General of the United States Capitol Police and the department itself, fall under the Legislative Branch of government and is not subject to the Freedom of Information Act."

This response seems to present concerns over the Separation of Powers doctrine. The U.S. Constitution vesting clause (Article II, Section 1) begins:

The executive power shall be vested in a President of the United States.

When these words were written, "executive power" in the 13 Colonies seems to refer to the powers of provincial governors, which seem distinct from those powers delegated to the legislature or courts.

Q: Is there any historical basis for a national legislature to appoint its own police force and exclude it from the executive branch agencies' obligations?

Stated another way: Under the U.S. Constitution, which of the enumerated powers of Congress permits them to control or command an armed force of any sort?

Security at the U.S. capitol

(Historical photo) The executive branch always has taken responsibility for the security of the Capitol. In my personal memory (1968), the National Guard was ordered by the president to install machine guns on the steps of the Capitol, and they (of course) complied with this as a legal order. On the other hand, in 2021 Nancy Pelosi wanted machine guns deployed again, and sought to have this done through the Capitol Police according to the acting DHS deputy secretary at the time. A determination was made that this was not a legal order, under separation of powers.

For reference, according to the USCP, it is governed by the Capitol Police Board, made up of:

  • Karen H. Gibson, United States Senate Sergeant at Arms (Chair)
  • William J. Walker, U.S. House of Representatives Sergeant at Arms (Member)
  • J. Brett Blanton, Architect of the Capitol (Member)
  • Yogananda D. Pittman, Acting Chief of Police (Ex-Officio Member)

None of these officials report to the executive branch. Furthermore, the official board members are not police force members. There have been claims by capitol police union members that delays generated by board members and senior officers left the rank and file vulnerable to mobs on January 6th.

P.S. It seems relevant to compare the USCP with the U.S. Marshals Service, which provides (among other things) protection for Federal Courts and Judges. The Marshals Service is a part of the Executive Branch, though they serve the Judicial Branch.

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    Rather than the USMS, you could also compare with the SCOTUS police: en.wikipedia.org/wiki/Supreme_Court_Police Commented Jul 26, 2021 at 3:58
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    At the time the constitution was written, law enforcement was often done by officers of a court, e.g. a sheriff, marshal, or other magistrates. For that reason, comparing them to USCP seems inapplicable. Congress gets the power to define the law (within limits), not enforce it. That's part of the separation of powers. Commented Jul 26, 2021 at 17:00
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    As a courtesy, downvotes on questions are generally expected to be accompanied by comments and constructive criticism explaining the reasoning for the downvote. Commented Jul 26, 2021 at 17:35
  • Why not get pissed at the en.wikipedia.org/wiki/Supreme_Court_Police while you're at it? Didn't exist until 1935. Congress' one is from 1801/1828 depending how you slice it. Commented Mar 5 at 11:56
  • And no, police is not an "armed force" in the same sense as the military. Police are considered civilians in international law, for instance. And since the US has the 2nd amendment, everyone [who exercise that] is an 'armed force' in your broad sense of the word. Commented Mar 5 at 12:04

2 Answers 2


Indeed, following the English, and later UK Parliament, most state legislatures appoint a Sergeant-at-Arms, to keep order and provide for security for a deliberative body. Colony legislatures had appointed these prior to 1776, and almost the first act of the US congress was to appoint officers, including a Sergeant-at-Arms.

The office of Sergeant-at-Arms is a "Sergeant" (literally servant) of the legislative house and answers to the House, not a Provincial, Colony or State Governor.

The principle that "Each House may determine the Rules of its Proceedings" is another fundamental principle, that entails the right of each House to appoint officers (police, if you will) to enforce those rules. The complexity and close working of the House of Representatives and the Senate has practically led to the two Houses combining for their joint security. This state of affairs has existed for 200 years, and has not been found unconstitutional (though I'm not sure that anyone has ever tried to challenge it)

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    The sergeant-at-arms is literally an armed servant. They keep order, not unlike a baliff. Sure the Capitol police have extended their remit far beyond just keeping order when the house is sitting. But the principle of an "armed officer of the house" who answers to the house (and not to the governor etc) is represented by the S-a-A and the junior officers who answer to him/her, who, in the case of the Captiol include the Captiol Police.
    – James K
    Commented Jul 25, 2021 at 20:58
  • From a separation of powers standpoint, a bailiff is quite distinct as they are responsible for enforcing the decisions of a court, not a legislature. To this day, in most jurisdictions, a bailiff or sheriff is responsible for enforcement of due process (court ordered) evictions. Commented Jul 26, 2021 at 17:51
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    @Burt_Harris yes, the baliff is an officer that is appointed by and is answerable to the judicial wing of government. My answer is that officers that are answerable to the judiciary or answerable to the legislature are not an exercise of executive power by these wings of government and so don't break article II of the constitution.
    – James K
    Commented Jul 26, 2021 at 22:31
  • I've got no problems with the office of a seargant-at-arms as a legislative office, but the Capitol Police have are far beyond the Congresses authority to regulate itself, e.g. official records show the Capitol Police submitted a budget request for FY 2020 of $463 million, and now they are opening offices outside of DC. Commented Jul 26, 2021 at 23:55
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    Can I remind you that whether this is good or not is not within the scope of the answer. You seem to want to debate, but this isn't a debating forum.
    – James K
    Commented Jul 27, 2021 at 6:46

When the constitution talks about 'executive powers' it means the administration of federal law and policy, not the administration of all government activities. The House, Senate, Supreme Court, and other branches, institutions, and agencies of the federal government take care of their own 'in-house' administrative needs. The White House is not involved in the day-to-day minutia of running these entities.

The Capital Police are not a federal agency in the sense of the FBI or DEA. They have no mandate to investigate or enforce law with respect to the general public; they are organized solely to protect and secure the United States Capitol Complex. As such, they are closer to a private security force than a proper police force, and fall under the rubric of 'in-house' administration.

The Freedom of Information Act gives access to most of the records of public agencies — exemptions exist — but it doesn't apply to every aspect of the US government. In particular, the FOIA explicitly excludes Congress, the Courts, and the central offices of the White House. The argument here is that the Capital Police are not a federal agency but are internally administered by Congress itself, which makes them immune to FOIA requests. So far as I know this has never been tested in court, so we'll have to wait for judicial rulings. However, it is worth noting that issues of police conduct are usually presented as either matters of internal policy and practice, or as issues of privacy for the officers involved. Even if it were ruled that the Capital Police are subject to FOIA requests, information of that sort may still be denied under the exemptions list.

  • Comments are not for extended discussion; this conversation has been moved to chat.
    – JJJ
    Commented Jul 27, 2021 at 0:12
  • Thanks JJJ. To be clear, this is not a question about FOIA, but one of the constitutionally enumerated powers of the legislature, and if Congress has the power of controlling (rather than funding) armed forces of any sort. Commented Jul 27, 2021 at 0:29
  • @TedWrigley, it seems you are ignoring my (restated) question in bold in the question body. Commented Jul 27, 2021 at 0:37

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