"I" is for Immigration, "E" is for Enforcement

Let me get this right:
John T. Morton is in charge of this federal law enforcement agency called Immigration and Customs Enforcement, and he just happens to say (with an approving nod from Obama) that he may choose to NOT enforce Arizona's new illegal immigration law (which is patterned after already existing Federal Law).
Does Morton understand that the Rule of Law cannot be ignored?
That the Rule of Law trumps the Rule of Obama?
That he is now an Obama accomplice?
Or that the "I" and the "E" in the agency Morton heads stand for "Immigration" and "Enforcement"? Hello???