The tight Minnesota U.S. Senate race between Republican incumbent Norm Coleman and Democratic challenger Al Franken has become incredibly close, with Coleman clinging to a two-vote lead.

That's the latest tally after the state Canvassing Board spent a third day ruling on disputed ballots. There are hundreds of challenges yet to decide, as well as thousands of withdrawn challenges that have yet to be tallied.
 
Coleman had entered Thursday's session leading Franken by 360 votes. But that lead eroded all day as the board considered a pile of challenges brought entirely by the Coleman campaign. The pile included a big chunk of withdrawn challenges, many of which went quickly to Franken's column.

The board will resume its work Friday.