(a) Institution of civil actions When directed to do so pursuant to section 288b(b) of this title, the Counsel shall bring a civil action under any statute conferring jurisdiction on any court of the United States (including section 1365 of title 28), to enforce, to secure a declaratory judgment concerning the validity of, or to prevent a threatened failure or refusal to comply with, any subpena or order issued by the Senate or a committee or a subcommittee of the Senate authorized to issue a subpena