Now a week after Election Day, counties across Arizona are still counting votes, and the winner of one congressional race is still undecided.

Democratic Congressman Ron Barber currently leads Republican challenger Martha McSally by 654 votes, as of the time of this post.

See also:

-Ron Barber Now Leads Martha McSally

-Ken Bennett Says 277,011 Votes Left Statewide, 168,000 in Maricopa County

-Gabrielle Giffords' Aide Ron Barber Elected to Fill Former Congresswoman's Seat

Barber and McSally exchanged leads in the vote totals a few times as the ballot-counting started, although Barber's led McSally since the weekend -- but not by much.

Unlike his fellow Democrat, Kyrsten Sinema, Barber hasn't been able to pull away from McSally as the remaining ballots are counted.

This narrow gap between Barber and McSally has already started some nitpicking over a small number of votes, as McSally's team challenged 130 provisional ballots cast in Cochise County.

The argument was that some of those ballots were not sealed in the envelopes, and elections officials could have been counting, or -- get this -- "comingling" the ballots.

The National Republican Congressional Committee was somehow involved in this, issuing a statement saying that they believed the move was fair, but Barber's campaign has said that an agreement's been reached, and those votes will be counted.

"We are happy that Cochise County officials are going to be allowed to do their jobs and count these Southern Arizonans' votes," the statement from Barber campaign manager Jessica Floyd says. "We remain disappointed that Martha McSally's Republican attorneys attempted to insert themselves into the vote counting process, and we will be watching the process closely moving forward."

It's unknown exactly how many ballots remain to be counted, but as of yesterday's count from Secretary of State Ken Bennett, about 31,000 uncounted ballots remain in Pima County, and more than 9,000 in Cochise County. Obviously, that makes the race between Barber and McSally up for grabs for either candidate.