Worst president ever
On no issue in the poll did Bush receive more than fifty percent approval.
Only Richard Nixon and Jimmy Carter had lower approval ratings, and Nixon resigned rather than be impeached.
5/10/06 update: "His disapproval rating is 65 percent, just a point away from President Nixon's days before his resignation in 1974" (ABC News).
I've been hearing chatter that the Democrats can't win back the Congress this fall if they talk about impeaching the president (okay, we're not just talking about any president). I say screw the Democrats who think like that! This ain't about what it takes to win. It's about doing what the Constitution says you're supposed to do when the president breaks the law!
Furthermore, the approval of congressional Republicans may now be so low that the only way they might be able to hold onto their seats is if they themselves start impeachment proceedings.