In principle we can stop this!

White House Releases "Principles" for Permanent Iraqi Presence
By Spencer Ackerman - November 26, 2007
"After years of obfuscation and denial on the length of the U.S.'s stay in Iraq, the White House and the Maliki government have released a joint declaration of 'principles'for 'friendship and cooperation.' ... Iraq's leaders have asked for an enduring relationship with America, and we seek an enduring relationship with a democratic Iraq. We are ready to build that relationship in a sustainable way that protects our mutual interests, promotes regional stability, and requires fewer Coalition forces."

Yes, Article II states:
"[The President] shall have power... to make treaties"
BUT: there's an out!:
"[The President] shall have power, by and with the advice and consent of the Senate, to make treaties, provided two thirds of the Senators present concur."

The Senate can, in principle, derail an Iraq/U.S. accord... supposing, of course, that W bothers to consult the Senate!