Jon Huntsman.Photo: Christine Lu8.  Jon Huntsman

Presidential candidate, former governor of Utah

Before: “[W]e must put a value on carbon,” he said in October 2008. “Until we put a value on carbon, we’re never going to be able to get serious about dealing with climate change longer term. Now, putting a value on carbon either suggests that you go to a carbon tax or you get a cap-and-trade system underway.”

After: “Cap-and-trade ideas aren’t working,” he said in May 2011. “Much of this discussion happened before the bottom fell out of the economy, and until it comes back, this isn’t the moment.”

Read more about Huntman and climate.