Of which the Courts have final say, not the president...Laws are subject to interpretation.
President Lincoln said it best imo....
Lots more reading at link....regarding the topic...
The President’s Duty to Faithfully Execute the Law
The Honorable Bob Goodlatte A‌braham Lincoln is often paraphrased as saying, “The best way ‌to get a bad law repealed is to enforce it strictly.” While that paraphrase summarizes the gist of what Lincoln was saying, the full text of his remark is worth repeating. In 1838, early in his career...
The President’s Duty to Faithfully Execute the Law
November 6, 2014 10 min read Download ReportBob Goodlatte
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A‌braham Lincoln is often paraphrased as saying, “The best way ‌to get a bad law repealed is to enforce it strictly.” While that paraphrase summarizes the gist of what Lincoln was saying, the full text of his remark is worth repeating.
In 1838, early in his career, Abraham Lincoln delivered an address to the Young Men’s Lyceum of Springfield, Illinois. It was entitled “The Perpetuation of Our Political Institutions.” In it, he said:
He went on to say:Let every American, every lover of liberty, every well-wisher to his posterity, swear by the blood of the Revolution, never to violate in the least particular, the laws of the country; and never to tolerate their violation by others. As the patriots of seventy-six did to the support of the Declaration of Independence, so to the support of the Constitution and Laws, let every American pledge his life, his property, and his sacred honor;—let every man remember that to violate the law, is to trample on the blood of his father, and to tear the character of his own, and his children’s liberty. Let reverence for the laws, be breathed by every American mother, to the lisping babe, that prattles on her lap—let it be taught in schools, in seminaries, and in colleges; let it be written in Primers, spelling books, and in Almanacs;—let it be preached from the pulpit, proclaimed in legislative halls, and enforced in courts of justice.
When Lincoln refers to religiously observing the law “for the sake of example,” he is referring also to the example of the American Republic itself as an example to the world. Without enforcement of the law, there cannot be accountability under law, and political accountability is essential to a functioning democracy.When I so pressingly urge a strict observance of all the laws, let me not be understood as saying there are no bad laws.… But I do mean to say, that, although bad laws, if they exist, should be repealed as soon as possible, still while they continue in force, for the sake of example, they should be religiously observed.
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