Rep. Thomas Massie challenged President Obama to roll out the proof that humans have played a hand in climate change.
Mr. Massie, Kentucky Republican, said he was "disappointed" that the president in his second inaugural address blamed droughts on "human activity" and accused some of "denying the evidence of scientists."
"As somebody with a science-type background, I took offense at that," Mr. Massie said during a panel meeting billed as "Conversations With Conservatives." "I would challenge him to show us the linkage — the undeniable linkage — between droughts and the change of weather, and some kind of human activity."
At that point, Rep. Raul Labrador, Idaho Republican, chimed in: "It is not like you are an MIT graduate."
"Oh, wait, you are, sorry," Mr. Labrador quipped.
Mr. Massie, a graduate of the Massachusetts Institute of Technology, responded with a shrug of the shoulders and a smile.