Greg Orman has chosen Kansas State Representative John Doll, who before becoming an independent in joining the ticket was a moderate Republican.
https://www.ormanforkansas.com/about_john_doll
He will now be the Kansas Legislature's only independent.
This seems to be a move to increase his bipartisan credentials in the eyes of some Republicans who might have viewed him as being a Democrat stand-in in 2014 (though those that think that probably won't vote for him anyway).
Funny enough, Doll used to be a Democrat and ran for the big first in 2006.
Good grief. Two opportunistic peas in a pod.