Fresh off of last night's debate on CNN, the Romney campaign has a new video with a mash-up of GOP rival Rick Perry's worst performances at all of the recent debates. The question the video asks is if Perry is "ready to lead." Watch below:

This latest ad shows that while Herman Cain may appear to be Mitt Romney's biggest rival according to the current polls, the Romney campaign still considers Perry, who hauled in a cool $17 million in the last quarter, the more threatening primary opponent.

Near the end of the video, CNN's Gloria Borger mentions what seems to be a new variation of the Romney campaign's "electability argument." "He's going to have a hard time going against Barack Obama," Borger says about Perry. But the Democratic National Convention also has a new ad out today that may give an idea about what to expect from the Obama campaign if Romney is the nominee:

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