Norm Coleman now leads Al Franken by 231 votes according to the Star Tribune which is 16 more than he started with prior to the recounting. Of course the "real" margin has been almost entirely obscured by the more than 3,600 challenges lodged by the two campaigns. Nevertheless, I am not optimistic because county-by-county results show a clear pattern: the candidate who challenges the most ballots in a county is the candidate who has gained votes in the county. Here are some examples:
County
Who Gained & How Much?
Who Challenged More Ballots?
Aitkin
Coleman by 3
Coleman by 2
Anoka
Franken by 23
Franken by 30
Becker
Coleman by 39
Coleman by 37
Brown
Franken by 4
Franken by 3
Carlton
Coleman by 23
Coleman by 27
Carver
Franken by 8
Franken by 11
Dakota
Franken by 13
Franken by 10
Hennepin
Coleman by 27
Coleman by 34
Meeker
Franken by 43
Franken by 44
Stearns
Franken by 19
Franken by 15
Washington
Coleman by 12
Coleman by 8
There are exceptions to this pattern, mostly counties with a small number of challenges and very small gains or losses. Two other exceptions are Ramsey County where Franken has one more challenge but has gained 34 votes and St. Louis County where Coleman has issued a 100 more challenges but has gained only 57 votes. And Coleman has issued 80 more challenges overall compared to Franken but with 82% of the recount completed that difference alone won't net Franken enough votes.
Nate Silver's models still show Franken pulling ahead, possibly by 100 votes or more. The idea is that Coleman's challenges are negating clear Franken votes while Franken's challenges are more often to ballots ruled void (double votes, scribbles, etc.). But based on the county-by-county patterns it seems optimistic to me. Tell me I'm wrong, please.