Joe Biden, capping off his two-day visit to Los Angeles, told donors on Thursday that he was not getting too comfortable with his strong polling numbers.

“I know all that polling stuff looks good but it is a marathon and we have a long way to go.” Biden told about 70 people at a breakfast fundraiser at the Jonathan Club, a private downtown social club. “There’s a lot of people who are qualified and decent and running. And I think it’s one heck of a field, although I never anticipated there’d be 300 people running.”