I've heard lots of blather about Iran and the insurgency, but I'd like to see a lot more specifics and concrete evidence before assigning them primary blame for our current situation in Iraq.

For instance, which of the virulently anti-Shia Sunni insurgent groups is taking money and explosives from Iran? Where are the captured documents, weapons, explosives, etc., especially in the Sunni areas where our troops are taking the most casualties?

OTOH, I do see plenty of evidence that the Iranians have plenty of swing with our Iraqi government allies --- Talabani, Barzani, al-Hakim, etc. Strangely our President sees fit to decry Iran for trying to influence events in Iraq, but yet has no problem meeting and greeting with these various acknowledged friends of Iran in Iraq.