You just cant find good undercover help these days.

Staff for Senate candidate Russ Feingold, a Wisconsin Democrat, busted a right-wing activist who attempted to infiltrate the campaign as a volunteer Wednesday, they said.

The unmasking comes after conservative provocateur James OKeefe, who specializes in these types of stings, blew his own cover in an attempt to run a sting against George Soros by forgetting to hang up the phone after leaving a voicemail. (Thatll get ya every time.)

The Feingold sting apparently fell apart thanks to profiling on the part of the campaign. The would-be infiltrator was blonde and drove a big white pickup truck, which staff said was part of the tipoff.

The woman, who identified herself as Allison Moss, told Feingold staffers that she had been active in College Democrats at the University of Minnesota and wanted to get involved in the campaign. She also signed a nondisclosure agreement with the campaign under the same name.

But after a Feingold staffer began pressing Moss on some of her past work, her backstory started unraveling. The staffer said someone on the campaign had gone to the University of Minnesota and remembered Moss as a member of the College Republicans . Moss denied being involved. They also asked her whether she worked for the right-wing group Campus Reform and whether she gave a false name on her nondisclosure agreement.