"The United States Constitution divides foreign policy powers between the President and the Congress so that both share in the making of foreign policy."
from State Department web site
http://fpc.state.gov/6172.htm
I'm not sure if the Dubai deal falls under the category of foreign policy, but it seems congress can stick itself wherever it wants to. *look of dismay* :-(
since some Congressmen have taken on the role of Secretary of State...
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I saw a brief snippet of Senators quizzing Secretary of State Rice last week. They would probably have been embarassed to talk to their maid the way some of them (Kerry and Boxer/Finestein) spoke to Dr Rice.