Posted Tuesday, July 24, 2012 --- 2:07 p.m.
MADISON, Wis. (AP) -- Twenty percent of Wisconsin's voting-age population is predicted to turn out for the Aug. 14 primary that includes a four-way Republican race for the U.S. Senate.
The state's Government Accountability Board released its prediction for the primary Tuesday, three weeks before the election. That equates to about 870,500 voters. The highest turnout in a non-gubernatorial fall primary in the past 20 years was 21 percent in 1992.
This is the first year that Wisconsin's fall primary comes in August. It used to be a month later in September.
In addition to the U.S. Senate race, there are also primaries in two of eight congressional districts, five of 16 state Senate districts and 39 of 99 Assembly districts.
Copyright 2012. The Associated Press.