Obama never has cared about the constitution so why would he now?
Check it out:

Republican Congressman Paul Ryan told Sean Hannity on “Hannity” Tuesday that any attempt at amnesty through executive order on President Barack Obama’s part would be “blatantly unconstitutional,” and Republicans would block his efforts if they win the Senate.

HANNITY: If the president follows through on his threat for executive amnesty, what do you have in terms of tools at your disposal to stop him from doing that?

RYAN: Well first of all, it’s unconstitutional. We’re already going through the court system on other unconstitutional executive orders that he’s worked on and we would add this to the pile.