Ingraham also played a radio ad that Pawlenty had appeared in, alongside none other than then-Gov. Janet Napolitano (D-AZ), now the Secretary of Homeland Security.
The key moment begins at the 6:15 mark below:
"We don't always share the same views--" Pawlenty said in the ad.
Followed by Napolitano: "But we both agree it's time for Congress to deal with the real threat of climate change."
And back to Pawlenty: "If we act now, we can create thousands of new jobs in clean energy industries, before our overseas competitors beat us to it. So come on, Congress, let's get moving -- cap greenhouse gas pollution now."
Ingraham noted with a laugh that other candidates used to back cap-and-trade, as well, such as the TV ad from a few years ago of Newt Gingrich sitting on a couch outside the Capitol with then-Speaker Nancy Pelosi (D).
"Everybody in the race, at least the big names in the race, embraced climate change or cap-and-trade at one point or another, every one of us," said Pawlenty. "So there's no one who has been in executive position whose name is being bantered in a first or second-tier way who hasn't embraced it in some way."