What did Donald Trump do today?

He posted this:

This is a saying attributed to Napoleon. It is a watchword among right-wing figures from posters on the neo-Nazi site Stormfront to Nayib Bukele, the president of El Salvador who calls himself "the world's coolest dictator."

It was also quoted in the manifesto written by Anders Breivik, the Norwegian neo-Nazi who killed 76 people in what he said was an attempt to promote his ideas.

The popularity among Nazis likely derives from the fact that Adolf Hitler himself said essentially the same thing—"I am the law"—after consolidating his power by purging what he considered to be insufficiently loyal government officials.

It's not clear where Trump—or whoever is posting in his name—heard about it, but one likely avenue is his patron Elon Musk, who immediately posted it on Twitter.

Why does this matter?

• No matter how many times he claims otherwise, while the United States is still a democracy, Donald Trump is not above the law.

• "L'etat, c'est moi" doesn't work out well even when the ruler is competent and popular.

• A president who doesn't know or care that he's parroting neo-Nazi mass murderers and self-identified dictators isn't fit for office.