More from John Dean of Watergate fame

Is lying about the reason for a war an impeachable offense?

To put it bluntly, if Bush has taken Congress and the nation into war based on bogus information, he is cooked. Manipulation or deliberate misuse of national security intelligence data, if proven, could be "a high crime" under the Constitution's impeachment clause. It would also be a violation of federal criminal law, including the broad federal anti-conspiracy statute, which renders it a felony "to defraud the United States, or any agency thereof in any manner or for any purpose."

It's important to recall that when Richard Nixon resigned, he was about to be impeached by the House of Representatives for misusing the CIA and FBI. After Watergate, all presidents are on notice that manipulating or misusing any agency of the executive branch improperly is a serious abuse of presidential power.

I repeated this link because it is important.