In the exact wording of the Constitution the duty of the President as regards the law, is as follows: "he shall take Care that the Laws be faithfully executed" ( Article 2 Section 3 ) Not to create new laws, amend existing ones at whim, nor pick and choose which he would care to enforce.
Today President Obama has once again, this time publicly, tread on the law, the Congress, the Constitution, and his oath to uphold it, by announcing a new policy substituting executive fiat for the rule of law.
http://www.cnn.com/2012/06/15/politics/immigration/index.html
That the purpose of this abrogation of his responsibility is cynically shameless pandering in the hope of garnering votes only renders such faithless dereliction of duty even more despicable.