The thing that stands out to me is that Brownback carried uber-moderate Johnson County. I can only think of one - possibly two - reasons. First, a lot of people in JoCo have really benefited from the income tax cuts, especially the "small business" tax cuts, enough so that they opted to keep more money in their pockets rather than vote for a more ideologically-aligned social liberal.
Second, and this one's more of a reach, I think a lot of JoCo'rs resent all the bullshit talk about school funding, since JoCo taxpayers are essentially subsidizing schools in western Kanss that are completely inefficient and need to be consolidated.