Kansas Secretary of State Kris Kobach predicts 22% of registered voters will cast a ballot in next Tuesday's primary election.
That's similar to the statewide turnout in the 2008 primary, which he says is the one most like this year's contest.
Higher turnout is expected this year in the Wichita area, where former Republican Congressman Todd Tiahrt is trying to take back his old seat from incumbent Congressman Mike Pompeo. Kobach says this could mean 30% of registered voters in the district might show up at the polls.
Kobach says nearly 40,000 Kansans have already voted ahead of the August 5th primary.