Re-read the "Part II" section above. This has nothing to do with Bush, it has to do with Cantor's gross misunderstanding of the Constitution. He's not deferring to the president's judgment, he's claiming that the president has a power that he does not have under the Constitution, and that Congress lacks a power that it has. Check out the bit where Congressman Israel correctly describes the legal situation, and Cantor replies "Absolutely not."