Ignoring the fringe freaks that think Cheney is behind 9/11, there's still plenty of not unreasonable people who think there's evidence for a crime just concerning Iraq or Katrina. That there isn't...well, when's the last time facts got in the way of good political ranting?
Although they wouldn't get the 2/3 majority, you're right...but still, I contend that if they can impeach Clinton over a blow job, anything's possible.