I still think it's just pissed off teabaggers dragging down Roberts' numbers. Looks like Wolf really wounded him with the residency attacks. Still, it would take a miracle for him to lose.
When 68% of your state's residents don't support you despite the heavy advantages of incumbency, clearly it wouldn't take a miracle for you to lose.
It does when a lot of his opposition is from the right and his two opponents are from the left.
His opposition comes entirely from Kansans who want to be represented by a fellow Kansan, not a D.C. metro resident. When you've entirely lost touch with where you come from, and as a result happen to be almost as unpopular as Milton Wolf, who thinks the funniest thing in the world is to make fun of dead people, particularily dead people who were shot dead and had their head split in two, it says a lot about where you stand in people's sense of esteem for you.