The number of uncounted votes in Alaska’s tightly fought U.S. Senate race grew by 21,000 between Wednesday and Friday -- and more than 5,000 of those were votes that hadn’t been predicted in early accounts of the number of ballots outstanding. After election night on Tuesday, incumbent Democratic U.S. Sen. Mark Begich trailed Republican challenger Dan Sullivan by 8,000 votes, or 3.6 percent, and both campaigns have been closely watching as state elections officials collect additional ballots cast by mail, or at more than 200 so-called “absentee in-person voting locations” around the state, where people could vote early. More than 40,000 ballots will likely be counted starting Tuesday, though the number will probably climb even more before then. To win, Begich would have to reverse election night trends and win a substantial majority -- though his allies have pointed out that in the count following Election Day in 2008, Begich overcame a 3,000 vote deficit to Republican Ted Stevens and ultimately won by 4,000 votes. The spike between Wednesday and Friday was a reflection of state elections officials’ new accounting for more than 13,000 provisional ballots, 2,200 absentee ballots submitted by fax, mail or email, and some 5,200 ballots cast early at the in-person absentee voting locations across the state.