Most recently a leak destroyed a critical intelligence resource:
Leak Severed a Link to Al-Qaeda’s Secrets

A small private intelligence company that monitors Islamic terrorist groups obtained a new Osama bin Laden video ahead of its official release last month, and around 10 a.m. on Sept. 7, it notified the Bush administration of its secret acquisition. It gave two senior officials access on the condition that the officials not reveal they had it until the al-Qaeda release.

Within 20 minutes, a range of intelligence agencies had begun downloading it from the company’s Web site. By midafternoon that day, the video and a transcript of its audio track had been leaked from within the Bush administration to cable television news and broadcast worldwide.

A partial list of Busheviki national security disasters:
Failing to properly act on Colleen Rowley’s request for search warrant of  Moussaoui’s hard drive.

Pulling out of Army Rangers and failing to block bin Laden’s escape from Afghanistan.

Betrayal of Valerie Wilson

Betrayal of Muhammad Naeem Noor Khan

But this is also a list of Democratic failures to hold Bush accountable for his national security negligence. Every time a Democrat bleats about FISA and national security, we need to ask them why they have consistently failed to hold Bush accountable for earlier failures.