Boxer needs to make sure her base gets to the polls. And in a state where just 31 percent of the voters are republican, Fiorina needs to continue last minute appeals to independents. So both were criss-crossing the state Monday.
There are stark differences between Boxer and Fiorina. At a rally Monday in Los Angeles, Boxer seized on one of the most dramatic.
"Choice is on the ballot and when you vote for Boxer rather than Fiorina, you vote for choice, we're not going back to those days when women died," Boxer said.
Boxer's portrayal of Fiorina as, in her words, "walking in the far right lane," seems to be resonating with women. The last pre-election Field Poll shows Boxer with a wide lead, 52 percent to 37 among female voters.
Fiorina quoted a different poll to her supporters at a rally Monday outside Sacramento -- a CNN survey that indicates the vast majority of Americans feel the nation is headed in the wrong direction.
"You have to vote to make a change and retire Barbara Boxer after 28 years of failed leadership," Fiorina said.
The former Hewlett Packard executive made stops in Pasadena and San Diego on the eve of the election, as she tried to engineer an upset over Boxer. The latest Field Poll shows Boxer with an edge among likely voters, 49 to 41 percent.
Boxer was in Oakland Monday night, trying to make sure the polls translate into real votes. There, just as earlier in the day, she was hammering home the differences between the candidates.
"We're going to say yes to making California the hub of the new green energy economy," Boxer said.
But on the final day of campaigning, Fiorina told supporters to vote for a better future.
"Enough of a career politician who has done nothing to get government spending under control," Fiorina said. "In fact, everything she's ever done is about taxing more and spending more and borrowing more and regulating more."
President Barack Obama will be staying home on Election Day, but he will be working the radio talk shows, including one in Southern California, as he tries to turn out the vote. That as a new LA Times-USC poll shows Republicans are more enthused than Democrats heading into Tuesday.