One question in the survey showed Warren with a big lead over Brown: on the matter of who will "stand up for women's interests when in the Senate," 54 percent say Warren while just 19 percent say Brown. Brown has been making a big push for female voters recently, releasing an ad last week called "Women for Brown." An area where Brown is beating Warren by a significant amount: "Has deep roots here in Massachusetts." 44 percent say Brown does, while just 13 percent say Warren does. The two candidates will square off in their first general election debate on Thursday night. The WBUR-FM poll was conducted September 15 - 17 by Mass INC Polling Group and surveyed 507 likely Massachusetts voters for a margin of error of plus-or-minus 4.4 percentage points.