MADISON -- The Wisconsin Elections Commission estimates turnout for last Tuesday's primary was about 13 percent of the electorate, based on unofficial results from county clerks.
The commission earlier predicted about 16 percent turnout.
Approximately 572,000 votes were cast in the statewide U.S. Senate primaries, which is 12.8 percent of Wisconsin's 2016 voting-age population.
Official results won't be reported to the Elections Commission until early next week, and may not be certified and published until August 24. Statistical reports including the total number of ballots cast are not due until after Labor Day.
Elections chief Michael Haas says overall, the primary ran smoothly due to the low turnout and lack of contested elections.