"De León's campaign is founded on winning support from progressives who believe Feinstein is not liberal enough to represent California, as well as Latino voters".
Also of note, the California Democratic Party endorsed Jessica Morse in the District Four US House race.
Despite Saturday's setback, she is ahead of de Leon in the primary race by 29 percentage points, the latest polling of the race shows. De Leon has billed himself has a more progressive politician than Feinstein offering a fresh outlook to the party. Dianne Feinstein, won the support of 54 percent of the delegates at the party's convention in San Diego over the weekend.
The vote came after Mr.de León, who has been running an insurgent campaign, delivered a blistering speech that reflects deep divisions among Democrats here - and across the nation - about how to respond to President Trump.
Disney Announces Opening Date for Toy Story Land
The new section of the park includes roller coaster Slinky Dog Dash , Alien Swirling Saucers and a new track of Toy Story Mania . Toy Story Land will also feature Tinkertoy lampposts, Green Army Men and other toy-like design elements.
Feinstein's oppostion to single-payer health care, her anti-marijuana stance, and her repeated votes for President Donald Trump's nominations angered many California Democrats. It took Feinstein a while before she chose to vote against a spending bill last December and last January in order to show her protest over the Trump administration's immigration policy.
"California's greatness comes from acts of human audacity, not congressional seniority", Mr.de León said.
The longtime senator focused on her specific legislative record, including on gun control and sexual assault, saying she's a long fighter for Democratic values with the clout to get things done.
But de Leon, who authored "sanctuary state" legislation to limit California authorities from cooperating with federal immigration officials, has argued that Feinstein historically failed to stand up for young illegal immigrants brought to the U.S.as children.