But U.S. Rep. Steny Hoyer, D-Md., who will become House majority leader when the new Congress convenes in January, has said Democrats will refuse to seat Harris unless and until "substantial" questions about the integrity of the election are resolved.
The state board declined to certify Harris' race - where he has an unofficial lead of 905 votes over Democrat Dan McCready - last Friday, and will hold a hearing by December 21 on its investigation.
Harris broke his silence on the ongoing controversy on Friday, tweeting out a video statement denying any knowledge of wrongdoing and expressing openness to a new election if the fraud is significant enough.
The news comes as the Wake County District Attorney's office and the North Carolina State Bureau of Investigation investigate criminal allegations that Dowless used absentee ballots to alter the vote in Bladen County in the race for North Carolina's 9th Congressional District.
"Although I was absolutely unaware of any wrongdoing, that will not prevent me from cooperating in this investigation", Harris said in a video message posted on his Twitter account Thursday afternoon.
Harris leads McCready by 905 votes in the current ballot count, POLITICO reported.
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Some Bladen County voters have said strangers came to their homes to collect their absentee ballots, whether or not they had been fully completed or sealed in an envelope to keep them from being altered, according to affidavits offered by the state Democratic Party.
Here's how it works: Organizations check data on which voters requested absentee ballots but have not yet turned them in. "However, if this investigation finds proof of illegal activity on either side to such a level that it could have changed the outcome of the election then I will wholeheartedly support a new election to ensure all voters have confidence in the results". The form says the nature of the debt included "Reimbursement Payment for Bladen Absentee". Neither Harris, nor the head of the Red Dome Group, Andy Yates, responded to messages seeking comment.
CNN has made multiple daily attempts to reach Dowless for comment.
McCready, expressing outrage over what he called a shameful attack on democracy, withdrew his concession in a video released late Thursday. As November drew to a close, however, Harris' campaign also owed Red Dome more than $19,000 for other expenses, including digital advertising and "Robeson mailers".
Red Dome hired Leslie McCrae Dowless, a veteran political operative, to work on the get-out-the-vote operation on Harris' behalf.