"It's a new phenomenon in America that states can now sue the national government and become a kind of check and balance on the excesses of the federal government."

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I was very, very concerned about President Obama and how much executive order and how much executive power he tried to exert. But I think I want to be, and I think congress will be, a check on any executive, Republican or Democrat, that tries to grasp too much power. And really, a lot of the fault is not only presidents trying to take too much power, it's Congress giving up too much power.

— Rand Paul