Bruce Fein, the associate deputy attorney general under Reagan, has apparently seen enough.

In grasping and exercising presidential powers, Cheney has dulled political accountability and concocted theories for evading the law and Constitution that would have embarrassed King George III. The most recent invention we know of is the vice president's insistence that an executive order governing the handling of classified information in the executive branch does not reach his office because he also serves as president of the Senate. In other words, the vice president is a unique legislative-executive creature standing above and beyond the Constitution. The House judiciary committee should commence an impeachment inquiry. As Alexander Hamilton advised in the Federalist Papers, an impeachable offense is a political crime against the nation. Cheney's multiple crimes against the Constitution clearly qualify. [...]

In the end, President Bush regularly is unable to explain or defend the policies of his own administration, and that is because the heavy intellectual labor has been performed in the office of the vice president. Cheney is impeachable for his overweening power and his sneering contempt of the Constitution and the rule of law.

With a 67-vote threshold in the Senate, impeachment is a long-shot, but Fein, a conservative Republican, makes a very compelling case.