If you haven't noted its existence, you should definitely note the existence of the Wall Street Journal news pages' Washington Wire weblog:
John Harwood: DEMOCRATS TARGET RUMSFELD to boost election pressure on rivals. Campaign strategists seek intraparty consensus by focusing on accountability rather than Iraq troop withdrawals. A "no-confidence" vote in Pentagon chief, which Democratic lawmakers might offer on defense spending legislation, could embarrass Bush while appealing to Republicans who defend ousting Saddam but criticize war's execution.
One House Republican predicts leaders would heed White House urgings to block a vote. But a Republican consultant says some incumbents may embrace idea for distance from war setbacks. In private comments to top aides, Rumsfeld signals he plans to remain through Bush's term.
If Bush isn't already embarrassed by Rumsfeld, a no-confidence vote won't embarrass him. What it would do would make it harder for the media to continue to downplay the horror and contempt both sides of the aisle have for Donald Rumsfeld.