Cavernous stupidity
You know who the title is referring to without looking — it could only be one person. It’s sad that it’s the president of the United States, but it’s an apt phrase. Here’s Douglas Brinkley and Eugene Robinson on MSNBC:
Brinkley: Nothing Else Like Trump’s ‘Cavernous Stupidity’ In U.S. History | The 11th Hour | MSNBC