“The pretended power of suspending of laws, or the execution of laws, by regal authority, without consent of parliament, is illegal.”

Powerline has a good post on the Obama administration delaying the enforcement of the Obamacare employer mandate for one year, discussing and referencing a WSJ article by former Tenth Circuit Judge Michael McConnell in which he addresses the question. McConnell observes: “Article II, Section 3, of the Constitution states that the president ‘shall take Care that the Laws be faithfully executed.’ This is a duty, not a discretionary power. While the president does have substantial discretion about how to enforce a law, he has no discretion about whether to do so.”

This matter—the limits of executive power—has deep historical roots. During the period of royal absolutism, English monarchs asserted a right to dispense with parliamentary statutes they disliked. King James II’s use of the prerogative was a key grievance that lead to the Glorious Revolution of 1688. The very first provision of the English Bill of Rights of 1689—the most important precursor to the U.S. Constitution—declared that “the pretended power of suspending of laws, or the execution of laws, by regal authority, without consent of parliament, is illegal.”

To make sure that American presidents could not resurrect a similar prerogative, the Framers of the Constitution made the faithful enforcement of the law a constitutional duty.

The Justice Department’s Office of Legal Counsel, which advises the president on legal and constitutional issues, has repeatedly opined that the president may decline to enforce laws he believes are unconstitutional. But these opinions have always insisted that the president has no authority, as one such memo put it in 1990, to “refuse to enforce a statute he opposes for policy reasons.”