As you may have read here or elsewhere in the past few days, Sen. Marco Rubio of Florida, one of the Republicans testing the waters for a presidential run in 2016, has made clear he's a climate change denier.

But on Tuesday during a brief exchange at the National Press Club, a member of the audience asked through a moderator “what information, reports, studies or otherwise are you relying on to inform and reach your conclusion that human activity is not to blame for climate change?” He couldn't name a single source. So, he dodged the question and denied that he is a denier with a hokey mixture of truisms, truths, half-truths and BS.

Totally unnecessary. He could simply have referred to the peer-reviewed research of ExxonMobil, Ph.D., and Dr. David Koch and Dr. Charles Koch, climatologists.