Bloomberg announced new policies for combating poverty and homelessness. He also called for raising the federal minimum wage and for a dramatic expansion of the earned income tax credit.
Stockton Mayor Michael Tubbs endorsed Bloomberg at the event. Mayor Tubbs said Bloomberg first reached out a few months ago to find out more about Stockton.
The former New York City Mayor also recently garnered the endorsement of San Jose's Mayor Sam Liccardo.
"Mike Bloomberg has shown time and time again that he's willing to take on big oil, he's willing to take on the gun industry, he's willing to take on big soda with Coke and Pepsi," Liccardo told ABC7 News.
RELATED: Bloomberg's first Calif. visit as Presidential candidate to feature Bay Area stop with Jerry Brown
Later today, Bloomberg is scheduled to appear with Former Governor Jerry Brown at the American Geophysical Union convention in San Francisco.
According to the Chronicle, Brown is not expected to endorse Bloomberg, but they will talk about climate change.
Bloomberg is bypassing early voting states like Iowa and New Hampshire, instead opting to focus on California and other states that vote on Super Tuesday in March.
A recent UC Berkeley poll found Bloomberg to be the first choice of just 2-percent of the state's likely Democratic voters, but some experts say the races remain open.
WATCH: Former NY Mayor to campaign for 2020 Election in San Francisco, Stockton
Former NY Mayor to campaign for 2020 Election in San Francisco, Stockton