Summary

Pierce Butler Reed v. County Commissioners of Delaware County…

Petitioners do not claim that any act of Congress authorizes the committee or its members, collectively or separately, to sue. Of course, South's authority is no greater than that of the committee which he represents. The suit cannot be maintained unless the committee or its members were authorized to sue by Resolutions 195 and 324, even if it be assumed that the Senate alone may give that authority.
Source: Wikisource

Pierce Butler Reed v. County Commissioners of Delaware County…

That power carries with it authority to take such steps as may be appropriate and necessary to secure information upon which to decide concerning elections. It has been customary for the Senate-and the House as well-to rely on its own power to compel attendance of witnesses and producton of evidence in investigations made by it or through its committees.
Source: Wikisource

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