Wisconsin: Ron Johnson

“I absolutely do not believe that the science of man-caused climate change is proven. Not by any stretch of the imagination. I think it's far more likely that it's just sunspot activity, or something just in the geologic eons of time where we have changes in the climate.”

New Hampshire: Republican Candidates

It was symbolic when the six Republican candidates for U.S. Senate stood up together side-by-side during a debate Wednesday. It resembled their positions on major issues. … All said man-made global warming hasn't been proven.

Pennsylvania: Pat Toomey

“There is much debate in the scientific community as to the precise sources of global warming.”

Florida: Marco Rubio

“I don't think there's the scientific evidence to justify [climate change].”

Kentucky: Rand Paul

“…[climate change] may or may not be true, but they’re making up their facts to fit their conclusions.”

Missouri: Roy Blunt

“There isn’t any real science to say we are altering the climate path of the earth.”