Did you even read the article?  
"Trump fired a shot at Tillerson over the “moron” revelation, first reported by NBC News and confirmed by several other news organizations, including The Washington Post."  
Yes, tRump absolutely tried to debunk the truth and claim it was fake news that Tillerson called him a moron.  Now the current news that tRump dared Tillerson to take battling IQ tests!  How moronic is that?