The backing of 60 percent of the delegates was needed to secure the party's official endorsement. But, the California Democratic Party was not in favor of making her as a candidate to fight against the Republicans this time.
The Democrats are a torn party now and Senator Kamala Harris and U.S. Representative Maxine Waters are urging the members to stay united to face the midterm elections. And it's pretty clear that Kevin is positioned as more progressive than Sen. She hasn't done enough to challenge President Trump, and the state party is moving hard left.
"The days of Democrats biding our time, biting our tongue, and triangulating at the margins are over", he said.
"These are the people who are going to turn Congress blue, and turn California blue", de Leon campaign spokesman Jonathan Underland said. She holds a lead over de León of almost 30 percentage points - 46 percent to 17 percent ― in a recent poll conducted by the Public Policy Institute of California. On Sunday morning, de Leon hailed the vote as "an astounding rejection of politics as usual".
Feinstein was first elected to the U.S. Senate in a special election in 1992, and she has since been re-elected to four full consecutive terms. Feinstein only recently 37 percent of the vote. Former Los Angeles Mayor Antonio Villaraigosa, who is courting more moderate and even conservative voters, won 9 percent. The question is whether de Leon's good showing will push Feinstein further left, too.
Feinstein touted her successful measure banning assault weapons in 1994, which has since expired, and pledged she would not rest until a similar bill passes again.
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 immigrants brought to the US illegally as children.