Mr. Obama pulled in some star power for a rally in Wisconsin on Saturday. Singer Katy Perry performed for a crowd of supporters.
Campaigning in four states Saturday apparently took a toll on the president's voice. He sounded a little raspy as he asked for more time in office.
"I will work with anybody of any party to move country forward," the president said, "and if you really want to break the gridlock in Congress, you'll vote for leaders who feel the same way, whether they're Democrats, Republicans, independents, people who put you first, who put the American people first."
Romney is also keeping a busy schedule. He made his final stop of the day in Colorado, seeking to tap into voter disappointment and discontent. He told supporters there hasn't been enough progress over the last four years.
More than 27 million Americans have already cast their votes. In Southern California, voters turned out for early voting at the Los Angeles County Registrar-Recorder Office in Norwalk.
Gov. Jerry Brown is also urging Californians to vote. He is making several stops in la this weekend, urging support for Proposition 30. The controversial measure would impose a temporary tax increase to raise billions to help fund education.