MADISON, Wis. — The plagiarism scandal surrounding Democratic gubernatorial candidate Mary Burke may be affecting Wisconsin voters. The latest Marquette University Law School poll, released Wednesday, shows incumbent Republican Gov. Scott Walker has opened up his lead against Burke by 5 percent among likely voters. Of the 585 likely voters who participated in the Marquette poll between Sept. 25-28, 50 percent said they would vote for Walker; 45 percent said they would be voting for Burke. The poll’s margin of error is 4.1 percent. Information for Marquette’s previous poll, which had Walker ahead of Burke by 3 percent, was collected...