Tim Pawlenty may have once promoted cap-and-trade as a response to climate change, but now he considers that choice a "battle scar.” Because nothing’s more traumatic than caving to peer pressure.

"We all [have ‘clunkers’ on our records], and that's one of mine," he said last night at the first debate in the Republican primary. "I just admit it. I don't try to duck it, bob it, weave it, try to explain it away." He does, however, reverse course, backpedal, disown, and disinherit it.

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Pawlenty has been particularly vocal about disowning cap-and-trade in recent months, perhaps because he's a bit of flip-flopping fish out of water in a field of Republican presidential contenders far to his right. But according to the former Minnesota governor, he's been trying to walk back his support for cap-and-trade for years.

"I sent a letter to Congress, I think, about two years ago and at other times have said, I was wrong, it was a mistake, and I'm sorry. It's ham-fisted, it's going to be harmful to the economy," he said.