Rove served as an adviser to American Crossroads, one of the most aggressive outside donors in the 2012 election cycle. But a study published in November by the Sunlight Foundation found that Rove had a success rate of just 1 percent on $103 million in attack ads purchased — among the lowest return on investment of any outside group.

On Wednesday, Rove defended his new organization, saying critics in the Tea Party were "wrong" to back unpolished candidates.

"Some people think the best we can do is [Former Rep.] Todd Akin [R-Mo.] and Richard Mourdock — they’re wrong," Rove told Fox News. "We need to do better if we hope to take over the United States Senate. We need to get better conservative candidates and win."

Akin and Mourdock, two Senate nominees who won with heavy Tea Party support in their Republican primaries, both damaged their 2012 general election campaigns with comments they made regarding rape. They later lost those contests in Indiana and Missouri, respectively, that Republicans had believed were winnable races.