About half of the challenged voters are under 30 years old, the group said.
The list also included Kevin Furey, a former Democratic state representative and Army Reserve officer who has been activated for duty in the Middle East.
Furey, reached while visiting his grandmother in Chicago before he deploys to Kuwait, said Friday that he had forwarded his mail from his Helena address to his parents in Missoula County. He is registered to vote at his Helena address.
Furey said the challenge may affect many people in the military, and that it's "really egregious" if the challenges end up preventing members of the military from voting.
"It is ironic that at the same time I am about to return to Iraq to help build a democracy, that my own right to vote is being challenged at home for partisan purposes," he said in a statement released earlier. "These challenges are a blatant and offensive attempt to suppress the rights of voters."
Eaton said late Friday that he withdrew the challenge to Furey after learning about it from a reporter.
Matt Singer, the head of Forward Montana, noted that he, too, is on the list of challenged voters.
"This lists of challenged voters is ridiculous," he said.
http://www.billingsgazette.net/articles/2008/10/04/news/state/25-gopchallenge.txt