Jon Stewart posted two clips that were of the most importance regarding Iran last night. Bush is trying to stir the pot and say Iran is supplying parts for IED's. While Pace and Rumsfeld can't verify his words.
Bush: Some of the most powerful IED's that we are seeing in Iraq today-includes components that came from Iran.

Reporter: Do you have proof that they are indeed behind this, the Gov't of Iran?

Pace: I do not sir.

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The segment went on to show how "Stepford-like" the talk heads are as each cable news station repeats the same meme as if they received their talking points from Rove's office simultaneously.

Eric Brewer quizzed Scotty about Iran immediately.

"Then last Monday, President Bush repeated Negroponte’s claim in a speech that appeared to be the opening round in a new "drumbeat to war" against Iran. But the administration is perhaps getting sloppier, for the next day it appeared that not everyone was on the same page. When Joint Chiefs of Staff Chairman Gen. Peter Pace was asked about the claim with these words, “Do you have proof that they are, indeed, behind this, the government of Iran?”, Gen. Pace replied, "I do not, sir." Immediately afterward, Secretary Rumsfeld also failed to endorse the accusation, saying:...read on

(hat tip Atrios )