Very sad that the FBI missed all of the many signals sent out by the Florida school shooter. This is not acceptable. They are spending too much time trying to prove Russian collusion with the Trump campaign - there is no collusion. Get back to the basics and make us all proud!— Donald J. Trump (@realDonaldTrump) February 18, 2018
Article 2, Section 1, Clause 8 of the Constitution spells out the presidential oath: "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."
Arguably, his failure to react to the attack is a violation of this oath.
But he is also breaking his oath on an even deeper level.
Madison wrote that the stability of the constitutional order depended on the veneration of its institutions "without which perhaps the wisest and freest governments would not possess the requisite stability."
Trump routinely attacks anything or anyone who gets in his way -- including Congress, the courts, and public servants. And his constant lying undermines respect for the presidency.
He is not preserving, protecting, and defending the Constitution.
He is damaging and deserting it.