Secrets and Lies Becoming Commonplace (tags)
The initial refusal of President Bush to let his national security adviser appear under oath before the 9/11 Commission might have been in keeping with a principle followed by other presidents -- the principle being, according to Bush, that calling his advisers to testify under oath is a congressional encroachment on the executive branch's turf. (Never mind that this commission is not a congressional body, but one he created and whose members he handpicked.)
There is now more than enough evidence of the Bush family's business dealings with Osama bin Laden, plus their history of collaborating with Nazi Germany to more than justify a Congressional investigation and impeachment.