Democratic challenger Jim Doyle has a small lead in a new poll over Republican incumbent Scott McCallum in the race for Wisconsin governor.

The University of Wisconsin Survey Center poll, released Friday, was the first since the Sept. 10 primary.

Doyle had a 43 percent to 35 percent lead over McCallum in the telephone survey of 539 registered voters conducted Sept. 17-25. The margin of error was plus or minus 4 percentage points.

Libertarian Ed Thompson had 6 percent support, and Green Party candidate Jim Young 1 percent. Fifteen percent were undecided.

The poll was sponsored by the Milwaukee Journal Sentinel and The Capital Times of Madison.

In an indication that the race is still fluid, 37 percent of respondents who stated a preference said they may change their minds by Nov. 5.

"The size of the lead is small enough, it could easily change,'' said Donald Ferree of the survey center.