Less than half of Douglas County's nearly 32,000 voters are expected to participate in this year's primary election.Clerk-Treasurer Ted Thran said he's expecting 40 percent turnout in the election.Early voting begins on May 26, but Thran said he's already received around 1,700 requests for absentee ballots.Thran said the lower turnout will help the clerk's office prepare for what's expected to be a big response for the presidential election in November."It means we can get all the bugs worked out for the general election," he said.Thran said the clerk's office has enough voting machines and people to staff polling places throughout …