For a law to be passed in the US, it must be approved by the House, the Senate, and the President. For a law to be repealed in the US, the repeal must also be

For a law to be passed in the US, it must be approved by the House, the Senate, and the President. For a law to be repealed in the US, the repeal must also be approved by the House, the Senate, and the President. So there will often be situations where it matters what the current law is - whenever these three components of the system do not agree, so that the current law will not be changed. In such a situation, it is not supposed to be the case that the President (in control of the executive branch) can unilaterally decide that the current law is whatever they want it to be.