Presidential candidate Senator Sen. Ted Cruz (R-TX)is showing Sierra Club President Aaron Mair to be an ideological hack and global warming alarmist.

At a hearing of the Senate Judiciary Subcommittee on Oversight, Cruz subjected him to a withering cross examination. Mair was reduced to stammering and frequent awkward pauses which he used to receive whispered advice from staff. He repeatedly referred to the discredited “97 percent of scientists concur” claim, and was unwilling to acknowledge valid scientific data that disproves the claim.

Mark Steyn, sitting in for Rush Limbaugh on Wednesday, called Cruz’s relentless questioning of Mair “a thing of beauty.”

Ten different times in his testimony, Mair claimed that “97 percent of the scientists concur and agree that there is global warming.”

“The problem with that particular statistic, which gets cited a lot,” Cruz rebutted, “is it’s based on one bogus study.”

The day began contentiously and Mair proved completely unprepared for the piercing questions posed by Cruz.

“In your written testimony you said that the science behind climate change and its effect on minority communities ‘should not be up for debate.’ I’m curious. For the Sierra Club is this a frequent practice to declare areas of science not up for debate, not up for consideration of what the evidence and data show?” Cruz asked of Mair.

“If you are relying on the evidence and data, you know the science, the preponderance of the evidence are there,” Mair responded.

“But that’s a different thing than saying we should not debate a question that the Sierra Club has declared this scientific issue resolved and there should be no debate,” Cruz pressed.

“Based upon the preponderance of the evidence the science is settled, but the thing is that anything is up for debate, Senator. We can debate,” Mair answered.

“I would note that even the phrase ‘preponderance of the evidence,’ having been a practicing lawyer for many years means 51 percent…at least 51 percent is what the preponderance means. I would ask, for example, if you want to end debate, you don’t want to address the facts, how do you address the facts that in the last eighteen years the satellite data show no demonstrable warming whatsoever?” Cruz asked.