Separation of powers? What separation of powers?

Leahy: Cheney Told GOP-Led Congress It Was ‘Not Allowed To Issue Subpoenas’
from ThinkProgress

Today in a press briefing, Sen. Patrick Leahy (D-VT) revealed that the White House had missed its 2:30 PM deadline to turn over documents to the Senate Judiciary Committee regarding legal justifications for the National Security Agency’s eavesdropping program. The Committee had already pushed back the original July 18 deadline twice after the White House requested more time.

Leahy said that the administration’s stonewalling amounted to “contempt of the valid order of the Congress,” and pointed out that these subpoenas were passed by broad bipartisan votes. In fact, the Senate Judiciary Committee in the conservative-led 109th Congress, chaired by Sen. Arlen Specter (R-PA) also attempted to ask questions about the program’s legal justifications. But Vice President Cheney personally barred him from issuing subpoenas:

In fact, we were about to issue subpoenas then and one of the senators came to our meeting and said that the vice president had met with the Republican senators and told them they were not allowed to issue subpoenas.

Not quite sure that’s my understanding of the separation of powers, but it seemed to work at that time.

(ThinkProgress has the video.)