Clint Eastwood stars in pro-Romney ad

Clint Eastwood is back promoting Mitt Romney's candidacy in a new ad paid for by a GOP super PAC founded by Bush strategist Karl Rove.

"When someone doesn't get the job done, you have to hold them accountable," Eastwood says in the campaign commercial from American Crossroads. "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. There's not much time left, and the future of our country is at stake."

The last time Eastwood was in the spotlight on Romney's behalf, the actor-director was derided for speaking to an empty chair and his rambling monologue at the Republican National Convention in Tampa.

This time, there are stark images that evoke people looking for work and the trade imbalance with China, as Eastwood's voice is heard: "23 million people can't find full-time work," and "we borrow $4 billion every single day."

American Crossroads and its sister organization, Crossroads GPS, have spent more than $63 million in this election to support Republicans, and they are the biggest of the deep-pocketed independent groups shaping the 2012 election.

The Eastwood ad is one of three commercials American Crossroads is going to run in the swing states of Colorado, Florida, Iowa, Nevada, New Hampshire, Ohio and Virginia. The group is spending $12.6 million on the ad campaign, which is the group's largest one-week ad buy of the campaign.