The Mitt Romney camp, which launched an anti-Rick Perry website, careerpolitician.com, on Tuesday, unveiled a new Web ad this afternoon that is, essentially, a collection of the Texas governor's worst moments from the GOP presidential debates he's participated in since joining the race in August. The Romney campaign announced the new video, titled "Ready to Lead?" on Facebook by asking followers "Do you think Governor Perry would be able to challenge President Obama in a debate?" The video includes footage from Mr. Perry's performance in Tuesday night's Las Vegas debate, which most observers agreed was the governor's strongest.