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Republican presidential candidates John Kasich, Jeb Bush, Marco Rubio, Donald Trump, Ben Carson, Ted Cruz, Carly Fiorina and Rand Paul take the stage before the Republican presidential debate, Nov. 10, 2015, in Milwaukee. (Photo by Jeffrey Phelps/AP)
Rachel Maddow

As climate talks open, many candidates...

One professor said of a Republican presidential candidate, "This individual understands less about science (and climate change) than the average kindergartner."

msnbc Photography

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