During a question and answer session, one firefighter commented that both campaigns are publishing advertisements featuring family members of victims of asbestos-related illness. He asked Brown how Warren gets the victims' family members to go on her commercial.

"A lot of them are paid," Brown said. "We hear that maybe they pay actors. Listen, you can get surrogates and go out and say your thing. We have regular people in our commercials. No one is paid. They are regular folks that reach out to us and say she is full of it."

"What Scott Brown said today is so offensive to me and my family after what we went through," Ginny Jackson said. "He's sunk to a new low."

Jackson said going through her husband Sam's sickness and death from mesothelioma was one of the most difficult situations she ever endured.

"Sam and I were childhood sweethearts and we had been together since I was 15 years old," Jackson said. "I came forward in this campaign because Massachusetts voters need to know the truth about what Elizabeth Warren did to help families like mine who were affected by asbestos poisoning, rather than Sen. Brown's misleading attacks."