The Democratic CREDO super-PAC will target Rep. Michele Bachmann (R-Minn.) as part of its $3 million "Take Down the Tea Party Ten" campaign, a surprising move considering how safely Republican her district is.

The group said Bachmann's showing in her primary win last week convinced it to get involved in the race, arguing it showed her to be vulnerable. But Bachmann won against token opposition with more than 80 percent of the vote.

Becky Bond, the group's president, admitted that beating Bachmann was "more of a long shot" than the other races but said the group's members had pushed hard to include her as one of the final two members on the target list, leading her to decide to increase their targets from 10 to 11 members so as not to leave off a more winnable race.

"When we asked our members who we should add as the last two candidates there was overwhelming demand for Bachmann," she said. "After we added the two really close races, the Tea Party incumbents, we decided to add her too."

While some of the district she's running in is new to her due to redistricting, it actually is more Republican than the one she held onto with ease during the 2006 and 2008 Democratic waves: It gave President Obama 43 percent of its vote. The group might be adding Bachmann to the list as much because she is deeply detested by liberals, and promising to target the lightning rod could help them with their fundraising efforts.

The group has also added Reps. Jim Renacci (Ohio) and Mike Coffman (Colo.), two Republicans locked in tough races, to its target list.

Unlike most super-PACs, this group spends most of its money on on-the-ground campaign staff rather than advertising. Its other targets are Republican Reps. Chip Cravaack (Minn.), Allen West (Fla.), Steve King (Iowa), Joe Walsh (Ill.), Dan Lungren (Calif.), Sean Duffy (Wis.), Mike Fitzpatrick (Pa.) and Frank Guinta (N.H.). All are facing potentially competitive races.

This post was updated at 1:15 p.m.