California Sen. Barbara Boxer (D) wants to turn Sarah Palin’s backing for her Republican rival, Carly Fiorina, into a liability.

The two share the same "Drill, baby, drill" attitude, which is out of step with California, according to Boxer, who contrasted Palin's endorsement of Fiorina with the support she's getting from President Barack Obama.

"It's going to be a very tough campaign because truth doesn't enter into the vocabulary of my opponent very often," Boxer said at a fundraiser in Silicon Valley that featured Vice President Joe Biden. "The question in this race is, 'Who's on the side of California families?' It's as simple as that, and I don't have to tell you, I don't have to tell the vice president, these are very tough times for California."

The Fiorina campaign called Boxer "out of step with Californians."

"Since her promises to bring 400,000 jobs to the Golden State with her support of the so-called 'stimulus,' over 400,000 more Californians have lost their jobs, and the unemployment level has risen to a staggering 12.4 percent," Andrea Saul, a spokeswoman for Fiorina, said in a statement. "Carly Fiorina, on the other hand, is a proven business leader working to promote common-sense fiscal policy and real world solutions to create jobs."

During the Thursday evening event, about two dozen Fiorina supporters stood across the street, waving signs and chanting. They were audible but not visible from the back patio of the home where the event was staged, according to the pool report.

"When my opponents protesters say, 'Where are the jobs?' I've got working people in hard hats saying, 'Here I am!' " Boxer said.

"Ditto," said Biden, before launching into an almost hourlong speech.

"I never say anything I don't mean; I sometimes say more than I should," Biden said. "Straight up, let me tell you why I love this woman. She hasn't changed, she has the same passion, the same sense of 'There's nothing we can't do,' the same commitment as the day I met her."

The event at the Atherton home of venture capitalist John Freidenrich and his wife, Jill Clumeck Freidenrich, also featured Bay Area Reps. Zoe Lofgren, Anna Eshoo and John Garamendi.

Biden will attend a second event for Boxer in Los Angeles on Friday evening. 

--Updated at 7:39 p.m.