Pompeo made the statement while defending the US president after a book questioned Trump's mental abilities in filtering information presented to him.
The CIA director termed the allegations made in the book as "absurd".
On Saturday, Trump, in a public defence of his histrionics, went on a Twitter spree, branding himself as a "very stable genius."
This comes as Michael Wolff's book 'Fire and Fury: Inside the Trump White House' included depictions which paint Trump as uninformed, at times an erratic and a childish president.
"Actually," the president said, "throughout my life, my two greatest assets have been mental stability and being, like, really smart."
"I think that would qualify as not smart, but genius....and a very stable genius at that!" he said.
The president also touted his stunning victory in the 2016 presidential election and his career in television and business.
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