2007: Biden threatens Bush with Impeachment for taking military action w/out Congress apprvl

Biden once warned President Bush: War with Iran without congressional approval is impeachable. In a 2007 interview on "Hardball with Chris Matthews," Senator Joe Biden made headlines by threatening impeachment against President George W. Bush if he took military action against Iran without congressional approval. Biden expressed deep concern over the President's handling of the National Intelligence Estimate (NIE) regarding Iran, emphasizing that any unilateral military action would be a violation of constitutional authority.
BIDEN: Yes, I do. I want to stand by that comment I made. The reason I made the comment was as a warning. I don't say those things lightly, Chris. You've known me for a long time. I was chairman of the Judiciary Committee for 17 years, or its ranking member. I teach separation of powers and constitutional law. This is something I know.

So I got together and brought a group of constitutional scholars together to write a piece that I'm going to deliver to the whole United States Senate, pointing out the president has no constitutional authority to take this nation to war against a country of 70 million people, unless we're attacked or unless there is proof that we are about to be attacked.

And if he does, I would move to impeach him. The House obviously has to do that, but I would lead an effort to impeach him.

The reason for my doing that and I don't say it lightly. I don't say it lightly. I say it because they should understand that what they were threatening, what they were saying, what was adding up to be what looked like to the rest of the world what we were about to do would be the most disastrous thing that could be done at this moment in our history that I can think of."

Apologies for the poor quality video. I could not find anything better. This was shared by Rep. Thomas Massie.