Rubio said Sunday on ABC's "This Week" that he doesn't believe human activity is behind climate change.
"I do not believe that human activity is causing these dramatic changes to our climate the way these scientists are portraying it," the Florida Republican said. "That's what I do not -- and I do not believe that the laws that they propose we pass will do anything about it. Except it will destroy our economy."
Scarborough said Monday on "Morning Joe" that while he does believe human activity plays a role in climate change, he agrees with Rubio's point that "job-killing regulations" aren't necessary to combat it. He also argued that Democrats overreached on the issue of climate change -- particularly former Vice President Al Gore, whom he called a "televangelist" for climate science.
"Why are we talking about Al Gore?" Brzezinski asked. "If it was someone more substantial we should talk more. But it was Marco Rubio playing to the base, I suggest we move on. What do you think?"
"I disagree. I think Marco Rubio could be very significant in 2016," Scarborough responded.
"Well he could be, if he would actually answer a question without the fear of the base eating him alive," Brzezinski said.
"It was a long road to defend him there, think about that one," she added. "It took you five minutes to explain why Marco Rubio was okay in his answering and he wasn't. It was a bad answer."
Watch below, courtesy of MSNBC: