(CNN) Democrat Danny O'Connor has no plans to concede the special election for the Ohio 12th Congressional District to Republican state Sen. Troy Balderson until all provisional and absentee ballots are counted, his campaign manager tells CNN.

Annie Ellison, O'Connor's spokeswoman and campaign manager, says the campaign is confident that the thousands of ballots left to count could bring the margin within .5%, a split that would trigger an automatic recount.

"There is totally enough of a chance that out of the ballots that are left there are enough to go for Danny and bring us within the .5 needed for an automatic recount," Ellison said.

"We are going to do our due diligence," she added, arguing that now is not the time for O'Connor to concede or talk with Troy.

With all early- and Election-Day-votes counted on Tuesday night, Balderson led by 0.9 percentage points . However, the Ohio secretary of state reported there are 8,483 outstanding absentee and provisional ballots left to count -- much more than Balderson's 1,754-vote lead.

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