After claiming on Sunday that human activity does not cause climate change, Sen. Marco Rubio (R-Florida) suddenly found his ignorance credentials under attack by potential rivals for the 2016 Republican Presidential nomination. Now that Marcos thinking of running for President, he doesnt believe in climate change, said Texas Governor Rick Perry. To those of us with long track records of ignorance on this issue, he seems a little late to the rodeo. Sen. Rand Paul (R-Kentucky) echoed Gov. Perrys criticism, calling Rubio a dummy-come-lately on climate change. At the end of the day, I have faith that Republican voters can tell the difference between someone whos truly uninformed and someone whos just faking it, he said. These comments by Marco dont pass the smell test. By Sunday evening, a defensive Sen. Rubio was pushing back against the attacks, telling reporters, Any questions about the authenticity of my ignorance are deeply offensive to me. My refusal to accept the scientific research on climate change is a matter of public record, he said. On this issue and many others my ignorance should take a back seat to no ones. 