Authored by Glenn Greenwald via greenwald.substack.com,
In its ongoing attempt to investigate and gather information about private U.S. citizens, the Congressional 1/6 Committee is claiming virtually absolute powers that not even the FBI or other law enforcement agencies enjoy. Indeed, lawyers for the committee have been explicitly arguing that nothing proscribes or limits their authority to obtain data regarding whichever citizens they target and, even more radically, that the checks imposed on the FBI (such as the requirement to obtain judicial authorization for secret subpoenas) do not apply to the committee.
As we have previously reported and as civil liberties groups have warned, there are serious constitutional doubts about the existence of the committee itself. Under the Constitution and McCarthy-era Supreme Court cases interpreting it, the power to investigate crimes lies with the executive branch, supervised by the judiciary, and not with Congress. Congress does have the power to conduct investigations, but that power is limited to two narrow categories: 1) when doing so is designed to assist in its law-making duties (e.g., directing executives of oil companies to testify when considering new environmental laws) and 2) in order to exert oversight over the executive branch.