In her close GE races, of course, it was the rural parts that split tickets to a dangerous degree and these very voters that saved her. I guess that may be a name rec issue of Wenstrup's.
Yes, it is ironic, but the voters in question are more partisan (rural voters most places are more swingy), so while they don't like Schmidt, they would like a Dem replacement less.
There is a SuperPac going after incumbents in primaries. They went 1 for 2 in Ohio, defeating Schmidt, but not Kaptur.
Unless they were supporting one of the also-rans in that primary (I think there were two)...
What about Krikorian? He was the "establishment" candidate, I suppose.