There's no denying this label packs a political punch

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But Morano says the Obama administration and its allies are deliberately using the "denier" label to "intimidate and silence" their political opponents while they drive through their agenda.
The term is being used more frequently, he said, because greens know the last years of the Obama administration are their best chance to win carbon regulations at home and a climate agreement abroad, he said.
"They want a final push to just totally smear and discredit skeptics," he said. "The reins of power right now are on their side."
But "denier" effectively means "liar," and that's a risky message, Morano said.
"I don't like to say someone's a liar in political discourse, because it takes away from your case. You become the issue, and whatever language you use to say it," he said."