Elizabeth Warren, the Harvard law professor and Massachusetts Democrat, leads incumbent Republican senator Scott Brown by four points, according to a new poll from Suffolk University.

In the poll of 600 likely voters, 48 percent support Warren and 44 percent support Brown. Eight percent remain undecided. The Suffolk poll is the latest in a recent series showing Warren with a small lead over Brown. That’s brought the RealClearPolitics poll average to a 3.5-point lead for the Democrat.