Secretary of State Hillary Clinton may have let the cat out of the bag in an interview with Ecuadorian media:

QUESTION: Thank you very much.
I would like to start with the immigration debate in the United States. The recently approved law in Arizona has presented sort of a difficult scenario for the President Obama Administration. According to some polling, half of the United States has approved this law and maybe other states would like to implement it. How’s Obama Administration dealing with this debate? Is the immigration law near reality?
SECRETARY CLINTON: Well, Andrea, first, let me say how pleased I am that I have this chance to talk to you about these and other important issues. President Obama has spoken out against the law because he thinks that the federal government should be determining immigration policy. And the Justice Department, under his direction, will be bringing a lawsuit against the act.

From RightScoop via HotAir.