President Donald Trump said he would surpass Secretary of State Rex Tillerson in an IQ test, if Tillerson really called him a moron.

Last week, after NBC News reported that Tillerson, increasingly angry with Trump and other administration figures, referred to Trump as a moron, the president dismissed the story as phony.

But in an interview with Forbes magazine published Tuesday, Trump said that if the NBC report was true, hed compare IQ test results with Tillerson and come out the smartest.

I think its fake news, Trump said in the interview. But if he did that, I guess well have to compare IQ tests. And I can tell you who is going to win.

Tillerson last week gave an unscheduled press conference to address the story , praising his boss as smart and affirming his commitment to the president and the success of our country. Notably, he did not specifically deny calling Trump a moron.