What did Donald Trump do today?

He let a self-imposed deadline for developing a cybersecurity plan go by without finishing it--or starting it.

Today is the 90th day of the Trump administration. Shortly before taking office, and already anxious to distance himself from the kind of state-to-state cyberattacks he'd publicly requested that Russia do to Hillary Clinton, Trump announced that he would convene a panel of experts to report, within 90 days, on how to "aggressively combat and stop cyberattacks." He repeated the 90-day pledge on Twitter a week later.

As Politico reported today, Trump has not only not received a "plan," he has apparently not even assigned anyone to write it. The White House claims that it is a joint responsibility of the National Security Council and the Office of American Innovation, but a spokesperson for the NSC had never heard of it, and the Office of American Innovation--part of son-in-law Jared Kushner's portfolio of White House jobs--didn't even exist until about four weeks ago.

Why should I care?

• Presidents shouldn't make promises they have no intention of keeping.

• Alternatively, presidents shouldn't make promises they're incapable of remembering.

• Cybersecurity actually is really important.