President Obama, sagging in the polls, finished off his West Coast fundraising swing Monday night by telling supporters in San Francisco that Democrats would have to be "almost obsessive" in their efforts if he is to be reelected.

President Obama speaks during a campaign event at the Bill Graham Civic Auditorium, Monday, in San Francisco. (Carolyn Kaster -- Associated Press)

"I am pretty competitive, and I very much intend to win this election. But we’re only going to do it if everybody is almost obsessive for the next 29 days," said Obama, speaking to about 100 donors who spent $20,000 each for presidential remarks and a buffet catered by Alice Waters.

"So most of you have contributed to the campaign, but there is more than you can do over the next 29 days. There's a phone call you can make," Obama said. "There's an e-mail you can send. There is a trip into Nevada you can do to knock on doors. There are cousins and uncles and friends in battleground states all across the country."

Obama has long since locked up California, but came west Sunday for one last blast of cash from wealthy donors. Earlier on Monday, Obama met privately with a group of 25 high-dollar donors at the InterContinental Hotel, where tickets were $40,000 each.

He ended the day with another fundraising concert for 6,000 at the Bill Graham Civic Auditorium, where he told a spirited crowd that he'd heard all the negative reviews of his performance in last week's debate with Republican opponent Mitt Romney.

"Listen, after the debate, I had a bunch of folks come to me. 'Don't be so polite, don’t be so nice (they said).' But I want everybody to understand something -- what was being presented wasn't leadership, that's salesmanship. And we cannot afford another round of tax cuts for the wealthy."

Obama, who heads to Ohio on Tuesday for a late afternoon rally at the Ohio State University in Columbus, also continued to have fun with Romney's targeting of public television.

"For all you moms and kids out there, you should have confidence that finally somebody is cracking down on Big Bird. Elmo has been seen in a white Suburban. He’s driving for the border," said Obama, in an apparent reference to O.J. Simpson's infamous attempted escape from the law. Simpson, however, drove a Bronco.