The poll also measured President Obama
and Mitt Romney
's favorability in the state.
Romney's viewed favorably by just 39 percent of registered voters, while 53 percent see their former governor unfavorably. Obama's seen much more favorably, with 60 percent holding a favorable opinion of the president and 34 percent seeing him unfavorably.
It will be a steep climb for Brown to win the race if the president's numbers don't worsen in the state. And Brown's web ad
released Monday went after the president for his comments on small business -- taking on the president more directly than he has before (in fact, he's usually much more likely to talk about his bipartisan credential and his bills Obama has signed than to attack the president).
The poll is conducted quarterly on both cell phones and landlines. The survey was conducted from July 19 - 22, and the margin of sampling error is +/- 4.6 percent. The poll included 445 registered voters.