Iran has had a very harmful effect in a variety of ways in the region... fomenting unrest to a degree in Saudi Arabia, undoubtedly in Bahrain, and definitely in Yemen with Hamas, with Lebanese Hezbollah among other activities in locations.

It wasn't just Shia that would go to Tehran and see the commander of the Quds Force and others and the legitimate government leaders. It was also Kurdish leaders and Sunni Arabs who would even link up with Qassim Suleimani, the commander of the Quds Force - maybe not in Tehran but in Turkey or somewhere else.

I think it's reality that Iran is going to have influence in Iraq. All elements of Iraq accepted that.

David Petraeus Quotes