The Massachusetts U.S. Senate race is tightening, with Sen. Scott Brown (R-Mass.) deadlocked with his likely Democratic opponent, Elizabeth Warren, in a new poll.

According to the Boston Globe poll, conducted by the University of New Hampshire, 37 percent of voters are backing Brown, and 35 are with Warren. But the margin of error is 4.2 percentage points, meaning that the two candidates are in a statistical tie. Twenty-six percent of voters remain undecided.

More analysis of the results from the Globe:

Voters seem to have responded to Brown's message that he is a moderate, independent, and likable political figure, looking out for the state's interest regardless of party. And Warren, though less known, is seen by many as a consumer advocate, who would champion working people, tax the rich, and battle corporations.

Few poll respondents associated her with the "Harvard elitist" label that Brown has tried to tag her with. Likewise, only one in five of those surveyed agree with Warren's argument that Brown is marching in lockstep with the Republicans.

Warren was leading Brown in a recent poll by the Democratic firm Public Policy Polling, while a string of other polls had Brown ahead.