Clinton said Trump called climate change a hoax, while Trump interjected -- “I did not, I do not say that.”

So which is it?

Trump has called global warming a hoax repeatedly.

In 2012, Trump argued global warming was invented by the Chinese to hurt American trade, though he later said that was a joke. Since then, he's repeatedly used the word “hoax” to describe global warming in Twitter and on the campaign trail.

In December 2015, Trump said in South Carolina, "Obama's talking about all of this with the global warming and … a lot of it's a hoax. It's a hoax. I mean, it's a money-making industry, okay? It's a hoax, a lot of it."