8 U.S.C. § 1325 and the Immigration and Nationality Act of 1965.
President Obama is IMPEACHABLE now.
You cited the current FEDERAL LAW IN EXISTENCE he swore to execute when he took his oath of office as the nation's chief enforcement of lack of mental reservation and purpose of evasion.
If he wants to work with the Congress to scrap the law or revise it, that is his prerogrative and he can get out there on the bully pulpit circuit and say what he wants to say. But as a sitting President to oppose US law and its execution, puts him in violation of the Constitution. To come down on the state of Arizona because they have as a state taken action which is in agreement with standing Federal Law, and the president will NOT enforce the law, HE IS IN VIOLATION OF HIS OATH.