The state canvassing board going over disputed U.S. Senate ballots is getting a break from new withdrawals by Sen. Norm Coleman.

Coleman's campaign withdrew about 400 challenges Thursday morning. That leaves about 800 Coleman challenges for the board, which finished Democrat Al Franken's challenges Wednesday.

The canvassing board is aiming to finish its work by Friday night. 

Coleman, a Republican, led by 360 votes after the first two days of the recount.  But Franken is likely to close that gap as the board turns its attention to Coleman's challenges. The board is rejecting more challenges than it is upholding.