Former president Clinton will swing through the western United States in an effort to boost President Obama's reelection bid.
The trips come after a busy week for Clinton on the campaign trail, with visits to New Hampshire and Boston.
One of Obama's most popular surrogates, Clinton ensured himself a prominent role in the campaign after a well-received speech to the Democratic National Convention, where he blamed Republicans for the struggling economy.
In New Hampshire on Wednesday, Clinton slammed Mitt Romney for his now-infamous comment that 47 percent of Americans do not pay income taxes and are dependent on the government.
"The guy with a tax account in the Cayman Islands is attacking other people for not wanting to pay income tax?" Clinton said. "I mean, you've got to give him credit."
Sunday's fundraiser in Los Angeles will include the winner of an Obama campaign fundraising contest. "I’m meeting up with President Clinton on the campaign trail, and we both want to thank you in person," Obama said in an e-mail to supporters.
Clinton, however, will miss the weekend's glitziest campaign event — he is not expected to attend a Los Angeles fundraiser featuring George Clooney, Jon Bon Jovi, Katy Perry and Stevie Wonder, according to CNN.