His intended one being thoroughly debunked.*
Russ Feingold is also reportedly polling poorly against Chester A. Arthur. Two months ago, Feingold was leading his actual challenger, the Republican real estate magnate and pumpkin farmer Terrence Wall, 47% to 32%. It's difficult to envision Mr. Wall's prospects having improved much since then, given the recent quantity of negative press and his repudiation by the local right-wing intelligentsia.
* Not that that's stopped him before.