The WBUR poll gives her 45 percent support to Brown's 40 percent support. Only 12 percent of voters say they are undecided.
However, Brown retains his lead in likability — 52 percent of likely voters say they have a favorable opinion of him compared to 48 percent who have a favorable view of Warren. And this poll shows him posting more crossover appeal: He's pulling 15 percent of Democrats from Warren. Brown also has a 14-percentage-point lead among independent voters, significant in a state where over 50 percent of voters are unaffiliated with a party.
The poll was conducted among 507 likely Massachusetts voters from Sept. 15-17 and has a margin of error of plus or minus 4.4 percentage points.