After President Bush's thinly-veiled provocation of Iran and Syria in Wednesday night's escalation speech, Chris Matthews tried his hardest last night to press the ever-evasive Tony Snow on whether the President believes he needs to seek Congressional approval before taking any military action with regard to Iran.

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MATTHEWS: My concern is we‘re going to see a ginning-up situation whereby we follow in hot pursuit any efforts by the Iranians to interfere with Iraq. We take a couple shots at them, they react. Then we bomb the hell out of them and hit their nuclear installations without any action by Congress. That‘s the scenario I fear, an extra-constitutional war is what I‘m worried about.

Glenn Greenwald has a post up examining the President's power to attack Iran.