I think it's because Wyandotte county has large numbers of African-Americans, who are overwhelmingly Democratic.
Holy crap, Wyandotte went 60 30 in favor of the amendment.
It looks like only Douglas went against it.
Here in Rice county, where I am attending college, 80 percent voted for it.
A bit east in McPherson county, where I grew up, 75 percent....slightly less, largely because there was a well-organized opposition there.
Ironically, Saline county here in central KS had much less of a percentage of support than RINO Johnson. It passed by only 56 percent there. Really weird.....Salina must have a liberal streak. Even Wichita passed it 70/30.