State Sen. Van Wanggaard is expected to announce whether he wants a recount in last week's recall election. The outcome determines the majority party in the state Senate.
The Racine Republican has until Friday at 5 p.m. to request a recount.
An official canvass this week found Wanggaard trails his Democratic challenger by 834 votes, or 1.2 percent.
Democrats have called on Wanggaard to concede, saying a recount would only delay the inevitable. But Wanggaard's campaign said it wants to keep its options open.
The state Senate is currently split 16-16. The winner of Wanggaard's race will give his party majority control.
However, the victory would just be largely symbolic. The Legislature isn't expected to convene again until January, and the November elections could cause power to shift again.