On this morning’s conference call, Sen. Obama’s campaign manager repeated deep reservations about using the mail-in option in both Michigan and Florida. Yesterday, an Obama campaign strategist highlighted what he thought were potential problems: "Obviously there are concerns about a mail-in vote. I mean, there are concerns about eligibility, ballot security," [Axelrod] said during a conference call. [AP, 12/11/08] Even Sen. Obama is now expressing hesitation to endorse a vote by mail system. The Associated Press reported: Obama...said in an interview with CNN that he had reservations about a vote by mail. "I think there's some concerns in terms of...