The poll affirms what strategists in both parties have anticipated for months: this is going to be a competitive fall campaign. In the July survey, Walker and Burke were running about even.
A former executive at the bicycle company Trek and an ex-state commerce secretary, Burke is running a campaign focused on Walker's record on jobs and the economy. Walker has been tying Burke to unpopular former governor Jim Doyle (D), under whom she served as commerce secretary.
The Marquette poll of 609 likely voters was conducted from Aug. 21-24. It has a margin of error of plus or minus 4.1 percentage points.