Who else are they going to vote for if not Orman? He'll get the Democrats.
Turnout could very well be high. Democrats will see it as a chance to knock off Roberts, who they hate. Independents might be drawn to the polls out of the novelty of the situation - how often does an independent have a chance to win? Polls seem to show them being split with Orman a slight favorite. Moderate Republicans, and there are a boatload in Johnson County, may split between Orman and Roberts as well. The deciding factor may be the Wolf supporters. And right now they may just stay home.
“The deciding factor may be the Wolf supporters.”
Wolf has endorsed Brownback and chances are he will do the right thing and endorse Roberts.