UPDATED Wednesday, July 18, 2012 --- 1:05 p.m.
Posted Wednesday, July 18, 2012 --- 12:12 p.m.
MADISON, Wis. (AP) -- Republican state Sen. Rich Zipperer of Pewaukee is leaving the Senate to join Gov. Scott Walker's administration as deputy chief of staff.
Walker announced the appointment on Wednesday. Zipperer will begin the new job on Aug. 6, leaving Republicans with just 15 members in the Senate. Democrats have 17.
The 38-year-old Zipperer was elected to the Senate in 2010 after serving two terms in the Assembly.
Walker's spokesman Cullen Werwie says the governor plans to call a special election to replace Zipperer but no date has been set.
Under state law, the earliest Walker could call an election would be early December, which could allow a primary, if necessary, to be on the same day as the Nov. 6 presidential election.
Copyright 2012. The Associated Press.