Democratic U.S. Senate hopeful Elizabeth Warren was joined on the campaign trail Oct. 26 by Barbara Mikulski, a Maryland Democrat and the longest-serving woman in the U.S. Senate.

“America needs Elizabeth Warren in the United States Senate!”

Mikulski fired up the crowd of Warren supporters at UMass Boston, saying, “We’re here to talk about the future. The future of America. And I am telling you right now, we need Massachusetts. We need Massachusetts because Elizabeth’s victory could determine who controls the U.S. Senate in January 2013.”

Warren spoke next. She hammered Sen. Scott Brown for his record on women’s issues.

"Scott Brown had exactly one chance to vote for equal pay for equal work. He voted no. He had one chance to vote for insurance coverage for birth control. He voted no. And I’m going to add one. He had once chance to vote for a pro-choice woman to the United States Supreme Court and he voted no," she said.

Warren says she wants to go to Washington to stand up for women. 

Both Warren and Brown campaigns are courting the female vote with events, endorsements and ads. It’s a sign that both of them consider undecided women will be key swing voters in their extremely tight race.