In Article II of the US Constitution, that would be the the one that Presidents swear or affirm to uphold in Article II Section 1. says he shall take the following oath or affirmation:–”I do solemnly swear (or affirm) that I will faithfully execute the office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States.”
With that, the President must uphold the laws of the United States. On occasions, the Supremes have said this happens in the “Take Care Clause” which is below in Article II, Section 3.
The executive power shall be vested in a President of the United States of America.
…………….; he shall take care that the laws be faithfully executed, ……….
Note, it didn’t say just the laws you like, or unilaterally change the laws you don’t like.
The remedy for not doing this is in Section 4.
The President, Vice President and all civil officers of the United States, shall be removed from office on impeachment for, and conviction of, treason, bribery, or other high crimes and misdemeanors.
Now in the last few weeks due to the LAW known as BarackObamaCare, we have seen 5 million people thrown off their then Affordable Health Care, but the reason was, they were inferior to ObummerCare, but they also met the losers needs at a lower cost. BO has caught lots of flack for having a law doing this. And further more, Obummer has told these 5 million at least 29 times they could keep their policy. When called on this, Obummer said he didn’t say that. Now that a minor revolt has happened with the losers, the Reps and Senators seeing what they voted for, they were going to answer for. So, Obummer did what he has done a number of times, unilaterally changed the law. However, instead of doing what he usually does in the middle of the night, he did in the daylight, and poorly. Now Obummer is losing his allies in the Press, in Congress, and has lost the trust of the public.
This is reminding more and more of Nixon. We do have what looks like a probable Constitutional Crisis.