Oct. 16 (Bloomberg) -- President Barack Obama told a group of Democratic Party donors in San Francisco he’s determined to outlast his critics to move ahead on his agenda, including revamping the health-care system and financial regulations.

“Some of our opponents think they are going to wear us down,” Obama said at a fundraiser for the Democratic National Committee last night at the Westin St. Francis Hotel in San Francisco. “I’m not tired, I’m refreshed.”

Obama has been stepping up political fundraising, attending at least one fundraiser a month since May. He held his first in March, also on behalf of the DNC. He’s also headlined events for Democratic Senators Harry Reid of Nevada and Arlen Specter of Pennsylvania and gubernatorial candidates Jon Corzine of New Jersey and Creigh Deeds in Virginia.

Obama was joined at the tonight’s event by House Speaker Nancy Pelosi, who represents San Francisco. More than 150 people paid $30,400 per couple to have dinner with Obama and 900 paid between $500 and $1,000 to attend a reception.

The DNC is the only one of the three Democratic political committees that has taken in less money than its Republican counterpart, even as its income has risen. The DNC raised $53.6 million between Jan. 1 and Aug. 31, Federal Election Commission records show, compared with the $38.4 million raised during the same period four years ago. The DNC is still trying to pay off a $5.3 million debt.

During the same period, the Republican National Committee raised $59.9 million, down 21 percent from the $75.5 million take in during the first eight months of 2005, when the party controlled the White House and both houses of Congress.

The Senate and House Democratic fundraising committees both have raised more than the Senate and House Republican committees.

Obama will depart San Francisco later today for Houston. He is scheduled to attend a forum on community service at the invitation of former President George H.W. Bush, the father of Obama’s predecessor in office, former President George W. Bush.

Earlier yesterday, Obama stopped in New Orleans, which is still struggling to recover from the devastation of Hurricane Katrina four years ago.

To contact the reporters on this story: Jonathan D. Salant in Washington at jsalant@bloomberg.net; Kate Andersen Brower in San Francisco at kandersen7@bloomberg.net.

Last Updated: October 16, 2009 00:00 EDT