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Trump challenges Secretary of State Rex Tillerson to 'compare IQ tests'

ABC News.(WASHINGTON) -- President Donald Trump has challenged his secretary of state to compare intelligence IQ tests, suggesting he would score higher than Rex Tillerson amid reports that he called the president a “moron.”

“I think it’s fake news, but if he did that, I guess we’ll have to compare IQ tests,” President Trump said in a new interview with Forbes magazine. “And I can tell you who is going to win.”

The president is scheduled to sit down for lunch today with Tillerson and Secretary of Defense James Mattis at the White House.

Tillerson called Trump a "moron" after a meeting with national security advisers in July, NBC News reported last week, which Tillerson’s office has denied.

"The secretary does not use that type of language,” State Department spokeswoman Heather Nauert said last week. “The secretary did not use that type of language to speak about the president of the United States. He does not use that language to speak about anyone ... he did not say that.”

Trump has repeatedly dismissed the accusation as “fake news” but NBC News is standing by its reporting.

Tillerson reaffirmed his support for Trump last week in a statement to rebut the report, but would not answer whether he ever used the word “moron” to describe the president.

The State Department has also attempted to swat down rumors of Tillerson's possible resignation in July.

At the time, tensions between the White House and Tillerson were allegedly high over staffing at the State Department and Tillerson's ability to make decisions about the nation's foreign policy agency, senior administration officials told ABC News.

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