American Crossroads, "At Stake"

What it says: In his first political foray since the Republican National Convention, Clint Eastwood declares, "In the last few years, America's been knocked down ... Obama's second term would be a rerun of the first and our country just couldn't survive that. We need someone who can turn it around fast, and that man is Mitt Romney." 

What it means: Despite his odd and likely damaging turn at the RNC, Eastwood is still a hugely popular icon. Here, he sticks to the GOP message but adds a little of his personal charm. It's an interesting contrast with the Super Bowl ad he shot for Chrysler earlier this year, which some saw as boosting President Obama.

Who will see it: Voters in Colorado, Florida, Iowa, Nevada, New Hampshire, Ohio and Virginia.