David Frum @davidfrum
The most relevant case also involved bank records. The bank argued it had broken no law, subpoena would violate privacy. "Whether [the bank's] activities violated any statute is not relevant; the inquiry was intended to inform Congress in an area where legislation may be had." — PolitiTweet.org
David Frum @davidfrum
A simple summary of Congress's subpoena power would be: if Congress could lawfully legislate on a subject, it can subpoena on that subject.