Observers say the outcome of the Senate race may hinge on GOP challenger's willingness to use her own money against Democratic incumbent, who has a 3-1 advantage in available cash.
Heading into the final stretch of the campaign, Democratic Sen. Barbara Boxer continued to dominate fundraising in her race for reelection, maintaining a more than a 3-1 cash advantage over Republican Carly Fiorina at the end of the third quarter. But the two rivals raised money at a virtually even clip between July and September, at a time when the national party and outside groups began chipping in millions of dollars to help Fiorina cut into Boxer's cash advantage.
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