Conservatives just love the Constitution -- or at least they say they do. The thing is that they don't seem to have any idea how it works. At least that's a more charitable explanation than saying they don't care how the Constitution works and merely use it as a fig leaf while they undermine the rights it guarantees.
We have to marvel at what Boehner did. No matter his personal feelings about Obama, he could only undermine his own president in foreign policy if he simply had no respect for the office of the president. Compare this with the GOP position during the Bush administration, when any criticism or effort to oppose Bush was tantamount to treason.