With the Democratic primary for governor in its last week, new results for the Marquette Law School Poll, released Wednesday, show Milwaukee Mayor Tom Barrett opening a larger lead over his main opponent, former Dane County Executive Kathleen Falk, than was the case in March, before Barrett formally entered the race.

But there are still a lot of undecided likely-voters in the election set for May 8 – about 19% — which needs to be kept in mind, Professor Charles Franklin, director of the poll, said in an “On the Issues with Mike Gousha” session at Eckstein Hall.

Head-to-head poll results for a possible final election for governor on June 5 between Barrett and Republican Gov. Scott Walker indicate a race that is effectively a tie at this point. Results for both all registered voters and for those who say they are likely to vote put one percentage point between Barrett and Walker (in one case, with Barrett ahead, in one case with Walker ahead, and, in both cases, with differences that are clearly within the margin of error).

The poll results found Democratic President Barack Obama holding a nine point lead over Republican presidential candidate Mitt Romney, an increase from the March results. But Franklin said Wisconsin is shaping up as a state that will be in play in the fall presidential campaign.

Full results for the poll, including video of the session at which the results were released and Powerpoint slides of key results, can be found by clicking here.