After reiterating comments that Barack Obama and Hillary Clinton are the “founders of ISIS,” Donald Trump backtracked Friday, saying it was just a joke.

Having apparently watched a CNN item on the remarks, the Republican presidential contender took to Twitter early Friday to say he was just being sarcastic:

Ratings challenged @CNN reports so seriously that I call President Obama (and Clinton) "the founder" of ISIS, & MVP. THEY DON'T GET SARCASM?

— Donald J. Trump (@realDonaldTrump) August 12, 2016

In an interview on August 11 with Hugh Hewitt, Trump was questioned on whether the remark was serious by the conservative radio host. “Last night, you said the President was the founder of ISIS. I know what you meant. You meant that he created the vacuum, he lost the peace,” Hewitt said.

But the GOP nominee insisted he meant it literally. “No, I meant he’s the founder of ISIS,” Trump said. “I do. He was the most valuable player. I give him the most valuable player award. I give her, too, by the way, Hillary Clinton.”

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A few hours later on Friday, Trump continued to mock the ‘seriousness’ of the media in another tweet:

I love watching these poor, pathetic people (pundits) on television working so hard and so seriously to try and figure me out. They can't!

— Donald J. Trump (@realDonaldTrump) August 12, 2016