Eligible voters are being swept up in conservative activists' efforts to purge voter rolls

Conservative activists are poring over state voter lists looking for registration errors that can be used to file voter challenges.

The challenges tend to affect minority or younger voters who may be statistically more likely to vote Democrat , election officials say.

CBS News obtained video and transcripts from 11 separate sessions this year in which activists are seen strategizing how best to deploy voter challenges across the country.

"You're trying to put your foot on someone else's neck," says DeKalb County voter challenged voter activist.

"They're registering homeless folks there," says voter removed voter activist Lee Lee .

"I believe it's what God wants me to do," Lee says.

Lee is one of scores of volunteers who scours the rolls, looking for voters registered multiple times.

Video sessions obtained by CBS News raise questions about who exactly the software and its users are targeting.

Columbia County , outside of Augusta , Georgia , became the first local government in the country to adopt the software to help maintain its voter rolls.

CBS News found other instances of challenges that led eligible voters to have their right to vote questioned.